import std.algorithm, std.conv, std.stdio, std.string, std.digest.md;

immutable I_USED_THIS_SHELL_SCRIPT = q"EOS
numbers=(17 18 11 19 14 24 25 26 28 29 30 34 37 38 39 42 61 59 62 64)
for i in $(seq 1 20); do
  wget http://yukicoder.me/problems/${numbers[$(($i - 1))]}/testcase.zip -O $i.zip
done

for i in $(seq 1 20); do
  unzip $i.zip
  for f in $(ls test_*/*); do
    echo $(md5sum $f) $i
  done
  rm -r test_*
done
EOS";

immutable DATA = q"EOS
6652370b32194cf3a793dd95f0213160 test_in/01.txt 1
a0ff11074dd38e1dabcead1ccb08d258 test_in/02.txt 1
07b1242b82b8498105dc3c020787bcf4 test_in/03.txt 1
05ea0e7b9a059297769052a695994824 test_in/04.txt 1
044ca7878819b25e0b3b2cbcda77a3bb test_in/05.txt 1
19ce0b06739d3e5b904042ab27ba2cc0 test_in/06.txt 1
27c81e809a4c58edcbbaf31d0f0af41c test_in/07.txt 1
5ce4c31c5433a857d6930cfd1133ed7e test_in/08.txt 1
f9cfb69f810087cdd68fad217ec8b141 test_in/09.txt 1
6df45e4bf6afca75da7a79690165e91b test_in/10.txt 1
dbbf8220893d497d403bb9cdf49db7a4 test_out/01.txt 1
6eb5cefde6fcb8463cea70880a44eb98 test_out/02.txt 1
eb844645e8e61de0a4cf4b991e65e63e test_out/03.txt 1
84bc3da1b3e33a18e8d5e1bdd7a18d7a test_out/04.txt 1
26ab0db90d72e28ad0ba1e22ee510510 test_out/05.txt 1
0f0254a21dc87e8fc35a9c2402db93b6 test_out/06.txt 1
3bb50ff8eeb7ad116724b56a820139fa test_out/07.txt 1
eb844645e8e61de0a4cf4b991e65e63e test_out/08.txt 1
f0810a231ce25a35e0b225652e9e54ed test_out/09.txt 1
1ff1f1079687389af8322c6035ce3ba5 test_out/10.txt 1
48a24b70a0b376535542b996af517398 test_in/01.txt 2
166d77ac1b46a1ec38aa35ab7e628ab5 test_in/02.txt 2
7c67493bd72ceff21059c3d924d17518 test_in/03.txt 2
412009a52065c979bb390cf7defec31c test_in/04.txt 2
2260241c53ee2ec4f3ce5bffbbaca0c1 test_in/05.txt 2
77a319564621b96fa0656e24c67960ef test_in/06.txt 2
d38ce094b8ba92f37f97d681659bd1bc test_in/07.txt 2
42c464c02bc6377b92670ce79d63dbc4 test_in/08.txt 2
2523a81a95406a47b0d10fe37d3a7367 test_in/09.txt 2
ce5fa3a1754527bb45a2156001356651 test_in/10.txt 2
9265043d3ed60c298bf724d7bfede7e6 test_out/01.txt 2
9265043d3ed60c298bf724d7bfede7e6 test_out/02.txt 2
9265043d3ed60c298bf724d7bfede7e6 test_out/03.txt 2
a2eae7400008e77790c3272f754a14db test_out/04.txt 2
a2eae7400008e77790c3272f754a14db test_out/05.txt 2
9265043d3ed60c298bf724d7bfede7e6 test_out/06.txt 2
a2eae7400008e77790c3272f754a14db test_out/07.txt 2
9265043d3ed60c298bf724d7bfede7e6 test_out/08.txt 2
a2eae7400008e77790c3272f754a14db test_out/09.txt 2
a2eae7400008e77790c3272f754a14db test_out/10.txt 2
1dcca23355272056f04fe8bf20edfce0 test_in/1.txt 3
2cf2c17644d5bfc8aa0e1b4086172632 test_in/10.txt 3
65b6d8eb5086144489b00ce3565d47c1 test_in/11.txt 3
24b4973dc22412630432ce254a72e5a1 test_in/12.txt 3
636534c069c5939bae82fe746ad223fe test_in/13.txt 3
f760ff3894d8b6c7583306926bf4b37f test_in/14.txt 3
7bcceb8a9d3595e980190e2fee303ae9 test_in/15.txt 3
341f9041b1ba9a11317cc6eb2bddb055 test_in/16.txt 3
23d7a42110e7261c1349df9b9f022d32 test_in/17.txt 3
7a94fb5edbc2e8aedb3be36daaaf354b test_in/18.txt 3
831b2a2769ffdb16b9f4cfe8193d2b66 test_in/19.txt 3
166d77ac1b46a1ec38aa35ab7e628ab5 test_in/2.txt 3
d00e27d3fcfc6165d3e3f998d4218866 test_in/20.txt 3
48a24b70a0b376535542b996af517398 test_in/3.txt 3
0cd148eadafd85228b59bcd35237a594 test_in/4.txt 3
2f0b1cf366e0c7a3025a955ad7e4143d test_in/5.txt 3
9b668c9eb33ebf0cf3ad8f84c1f46bc8 test_in/6.txt 3
9104df7d35553828d0f7fd3560857c6b test_in/7.txt 3
0afe2e990f8f7ba1a137789c3c6b7f5d test_in/8.txt 3
7b79aca0f34c64fab64cb38d4dd8b9e2 test_in/9.txt 3
48a24b70a0b376535542b996af517398 test_out/1.txt 3
c2676d1aaf1ade280ebfe10526e16c24 test_out/10.txt 3
117796bc7e35da47adac8f9ad8f1dd7d test_out/11.txt 3
8f43fe94579c8e2e530fffa03fd41b76 test_out/12.txt 3
eb844645e8e61de0a4cf4b991e65e63e test_out/13.txt 3
eb844645e8e61de0a4cf4b991e65e63e test_out/14.txt 3
eb844645e8e61de0a4cf4b991e65e63e test_out/15.txt 3
eb844645e8e61de0a4cf4b991e65e63e test_out/16.txt 3
13e5e996cd65561509a70844b258b974 test_out/17.txt 3
11cf4a625d9b305981b8a85a4ae387f2 test_out/18.txt 3
cf8d7b68cb9a2f36671bd973a5a328d7 test_out/19.txt 3
7c5aba41f53293b712fd86d08ed5b36e test_out/2.txt 3
a25e229991ab7b8c6ab5414ff586346b test_out/20.txt 3
eb844645e8e61de0a4cf4b991e65e63e test_out/3.txt 3
eb844645e8e61de0a4cf4b991e65e63e test_out/4.txt 3
63cf7c8db392ec220067e32694368210 test_out/5.txt 3
eb844645e8e61de0a4cf4b991e65e63e test_out/6.txt 3
eb844645e8e61de0a4cf4b991e65e63e test_out/7.txt 3
0d96f49fdbbfecd236f36b3df4608c69 test_out/8.txt 3
fb69a746ba497a69ef57c1f704c8f4e3 test_out/9.txt 3
e06f49bab0dc706353c3eac8515a0c6d test_in/01.txt 4
63fcd32a7cc5c631821b552f823b69c7 test_in/02.txt 4
a95436eaf70f13d462f56edadcec60c4 test_in/03.txt 4
814256effae8c30132d485646b461054 test_in/04.txt 4
62366b47f0deb3023b82d2a5e4dd7681 test_in/05.txt 4
1226dda25a718c5fc8c5682bc9affe6f test_in/06.txt 4
52a541324ad29578fddcb0db2217db6e test_in/07.txt 4
cfd2cbf37ce05dd875b01ded08f2c93b test_in/08.txt 4
4c96e76f1a379a3f07d72b4b1006e4dd test_in/09.txt 4
f32c53d700e5240e7b18c59296172796 test_in/10.txt 4
8d014a8b61c251bc6cf9fd8e33ec606c test_out/01.txt 4
182f893f1518ca161126bd42f8a051e4 test_out/02.txt 4
182f893f1518ca161126bd42f8a051e4 test_out/03.txt 4
8d014a8b61c251bc6cf9fd8e33ec606c test_out/04.txt 4
8d014a8b61c251bc6cf9fd8e33ec606c test_out/05.txt 4
8d014a8b61c251bc6cf9fd8e33ec606c test_out/06.txt 4
182f893f1518ca161126bd42f8a051e4 test_out/07.txt 4
8d014a8b61c251bc6cf9fd8e33ec606c test_out/08.txt 4
182f893f1518ca161126bd42f8a051e4 test_out/09.txt 4
8d014a8b61c251bc6cf9fd8e33ec606c test_out/10.txt 4
9a112ddb8e7ed6fcc4a7edcab6d0f183 test_in/1.txt 5
8e8d20fede3050ed3d7e2a7feb3f7305 test_in/10.txt 5
5a65ad55ad9b045de482639b3e1d0e28 test_in/11.txt 5
903363a17e8c209f8c2d40a899c6c7e7 test_in/12.txt 5
dcd4429b510b763465b3be3692a254b6 test_in/13.txt 5
e2fa60b0465c5403aef5948029358278 test_in/14.txt 5
25837dd4e89cb880953db777a9f8ef64 test_in/15.txt 5
112c6762489cf067891d8811542db463 test_in/16.txt 5
57ce7afa7dff3b83425bba9b3eae4fac test_in/17.txt 5
1560d4323fa3900c1521117fb356641e test_in/18.txt 5
a04515fedb908363f860a7ceabb31c7e test_in/19.txt 5
639e27317ecb73ca5c925130ecf4cf45 test_in/2.txt 5
897bd0ac6d88cc34834f9f70dcb46a43 test_in/20.txt 5
280262bb00bfccfa4c24774d8faccde2 test_in/3.txt 5
71d44ee4b6bfd933b5f3a6d734e4779c test_in/4.txt 5
57bcb37b063bbbe7aac77a75649f85b5 test_in/5.txt 5
20dec015c383f62d1294bb3932783780 test_in/6.txt 5
e2ba7028637aa03b08e0ecdbe3b673b0 test_in/7.txt 5
4cf27ed0c222e2ad1926b5bef5ec3de4 test_in/8.txt 5
c322bc20762ac095f73e927908a72a15 test_in/9.txt 5
26ab0db90d72e28ad0ba1e22ee510510 test_out/1.txt 5
6ae2481905403d48e262774919e04927 test_out/10.txt 5
83de9f8ad800dc61db7810021d57f37a test_out/11.txt 5
071867626474acbe0af380ca62c1e98f test_out/12.txt 5
f3527f99cc6f600235ae6b562d3980d9 test_out/13.txt 5
969049573085c71a5d6dc034e34b56bf test_out/14.txt 5
cf4278314ef8e4b996e1b798d8eb92cf test_out/15.txt 5
fe9d26c3e620eeb69bd166c8be89fb8f test_out/16.txt 5
12fc54257f1ae2301d3f9db906d7f414 test_out/17.txt 5
f52f163317380a912b84fa81a69c6d6e test_out/18.txt 5
52ee216e7ea72db74e87cc1819fc6c59 test_out/19.txt 5
1dcca23355272056f04fe8bf20edfce0 test_out/2.txt 5
fca54b184f3da329ae09e8978790ded4 test_out/20.txt 5
b026324c6904b2a9cb4b88d6d61c81d1 test_out/3.txt 5
0a5ec754e3041febfcc17fffbb892d75 test_out/4.txt 5
54a24082cfebcd031ae7d0275379511e test_out/5.txt 5
0a5ec754e3041febfcc17fffbb892d75 test_out/6.txt 5
2fe51daae840593fb0f4076b307ccefb test_out/7.txt 5
d02a55da8edcc7ec95a59ce5c8a93f5b test_out/8.txt 5
919d117956d3135c4c683ff021352f5c test_out/9.txt 5
67b658cd26e2686929146241849276bf test_in/01.txt 6
3256f7590ddb45e4de2516f5fae95396 test_in/02.txt 6
12d1b73586d2f1a300f1ce6cc63edfab test_in/03.txt 6
889e77df1791d0a410a93947efc15fe7 test_in/04.txt 6
0a70991fbdf912c2eebed27e8abcafd2 test_in/05.txt 6
3f40c7b729fbd6be4ade89664ce30c6f test_in/06.txt 6
753ae3dc34f7b1f3933de4283d8509c9 test_in/07.txt 6
ab09c2523f5cad11cdd9e3378ed480ed test_in/08.txt 6
1646f815e617a1506c3e57a26c158fb7 test_in/09.txt 6
a1a5eac67c41f1354e4d7e50ba16ad78 test_in/10.txt 6
6d7fce9fee471194aa8b5b6e47267f03 test_out/01.txt 6
4f89a0f6c113ae3ff279af1e6c6286bb test_out/02.txt 6
6d7fce9fee471194aa8b5b6e47267f03 test_out/03.txt 6
ba8e026107b5c34d93391f64ea5b8b5b test_out/04.txt 6
40c114657016e0d701408eb5c11c9e7f test_out/05.txt 6
f2ca4241d0525d3601deeb62adc69afb test_out/06.txt 6
a7051e28bbcf02eb611bf8025f8e51ef test_out/07.txt 6
5c963cb01a25fffe54b459f7dc10c310 test_out/08.txt 6
fdb363807c64cbd35a49c568430f99ad test_out/09.txt 6
938ae0b427d42a72d585c8234aec22c9 test_out/10.txt 6
1dcca23355272056f04fe8bf20edfce0 test_in/01.txt 7
2737b49252e2a4c0fe4c342e92b13285 test_in/02.txt 7
154773ae5dc2d36d8b9747e5d3dbfc36 test_in/03.txt 7
ea19a0aa2adcf89283def6d8e8e12f15 test_in/04.txt 7
9c3c5c2435f8cd250da195e192eb88b7 test_in/05.txt 7
ea3bd91b35832daeb93799e030601a7a test_in/06.txt 7
3586677e327b69ba5ce5a7eff989cc13 test_in/07.txt 7
f3f445bcd060de295eb489d0232d1a31 test_in/08.txt 7
7714e8d6873173aa18bb3a91390ed0e6 test_in/09.txt 7
73a3e00facac0425e3a14ff87e2cb6f0 test_in/10.txt 7
92289ff0469cfacb19a2809e6b44b93a test_out/01.txt 7
fc07e56c1012af450b912af02f1e7c30 test_out/02.txt 7
92289ff0469cfacb19a2809e6b44b93a test_out/03.txt 7
92289ff0469cfacb19a2809e6b44b93a test_out/04.txt 7
92289ff0469cfacb19a2809e6b44b93a test_out/05.txt 7
fc07e56c1012af450b912af02f1e7c30 test_out/06.txt 7
92289ff0469cfacb19a2809e6b44b93a test_out/07.txt 7
92289ff0469cfacb19a2809e6b44b93a test_out/08.txt 7
92289ff0469cfacb19a2809e6b44b93a test_out/09.txt 7
fc07e56c1012af450b912af02f1e7c30 test_out/10.txt 7
04e90eb0c4a65eefa084dfea8e89de9f test_in/01.txt 8
e867414a12769d8adc9086093620b4a3 test_in/02.txt 8
c15d6580553f2be2c4b133441da760f3 test_in/03.txt 8
e28f58da56e572f4f27f9b837a4fe8c5 test_in/04.txt 8
d04e3cd98784a870b8dae31ab8e2c935 test_in/05.txt 8
897059f9374e64ed03e09a5b5044794c test_in/06.txt 8
69d224c83e03e0c3f6ff466fa06bc7dc test_in/07.txt 8
de61c37c042526933ac9ff5c99dd8681 test_in/08.txt 8
b627b556c53cb20b9ae8fa4665925aa9 test_in/09.txt 8
735f5246a7bde15f85ae368917eee087 test_in/10.txt 8
fc07e56c1012af450b912af02f1e7c30 test_out/01.txt 8
92289ff0469cfacb19a2809e6b44b93a test_out/02.txt 8
5ff2d623f9ec55b7207a0e15f076a511 test_out/03.txt 8
b9d27fd37514d704abe776e239029fae test_out/04.txt 8
559ffd2e020994c7117fdc38da1dd97d test_out/05.txt 8
a3d50a58dc67267b5e4619ecf73b2dcc test_out/06.txt 8
a3d50a58dc67267b5e4619ecf73b2dcc test_out/07.txt 8
a3d50a58dc67267b5e4619ecf73b2dcc test_out/08.txt 8
a3d50a58dc67267b5e4619ecf73b2dcc test_out/09.txt 8
a3d50a58dc67267b5e4619ecf73b2dcc test_out/10.txt 8
d9bc5bd50f7d4175f08955d629eb9cc9 test_in/01.txt 9
10f17e9e1e939fdedb8c97943d2502a8 test_in/02.txt 9
ce4f6cff52f7d4ad5304feb27a9ec734 test_in/03.txt 9
b2daf9bfbd08127bd85360ff51251500 test_in/04.txt 9
4d67ab951f390c4d58f87fcff508936a test_in/05.txt 9
06e4c6deb83d037c8e657a3a3b0f97e7 test_in/06.txt 9
295cb3d456c8af79901d0a3ec953b0c9 test_in/07.txt 9
cba60ca2c46c12714192c1247aa61d72 test_in/08.txt 9
1f13cd7b4c0c6d016de7d378ec965916 test_in/09.txt 9
78eda977b71d73abe019c283f3e46007 test_in/10.txt 9
26ab0db90d72e28ad0ba1e22ee510510 test_out/01.txt 9
26ab0db90d72e28ad0ba1e22ee510510 test_out/02.txt 9
1dcca23355272056f04fe8bf20edfce0 test_out/03.txt 9
48a24b70a0b376535542b996af517398 test_out/04.txt 9
1dcca23355272056f04fe8bf20edfce0 test_out/05.txt 9
1dcca23355272056f04fe8bf20edfce0 test_out/06.txt 9
48a24b70a0b376535542b996af517398 test_out/07.txt 9
6d7fce9fee471194aa8b5b6e47267f03 test_out/08.txt 9
48a24b70a0b376535542b996af517398 test_out/09.txt 9
1dcca23355272056f04fe8bf20edfce0 test_out/10.txt 9
6937d293db46952863894ffaea18f99b test_in/01.txt 10
a7afcf80942e478e802916baafcc50bf test_in/02.txt 10
b34fdcc268ba7c2a6c7dd7a06862b4fc test_in/03.txt 10
c5605a6eccd1e3cb802334b854f88613 test_in/04.txt 10
542f99fda489cdf19d1572e76a8be4f3 test_in/05.txt 10
bed95ecb7d0c1ea9894e19cd39eff0b7 test_in/06.txt 10
5a5277a7263c3b11d0559a95d55404fa test_in/07.txt 10
36c7943a67d5fb10cd92e9da6d4dbd06 test_in/08.txt 10
70db4655dca83a9646dcec64e6a7a47a test_in/09.txt 10
b3075c073d857fbaeea5cb02e955585e test_in/10.txt 10
62f76ed64ab8574e4818253d3197acaf test_out/01.txt 10
cad6e9f5464156c7f7120a2088e7bdae test_out/02.txt 10
9307070f7f02d59e01e5132a86e219d6 test_out/03.txt 10
d375aa5ac2fd2c8dd5e9b320bb86c06b test_out/04.txt 10
8337cdc20a473048fff4b5f23082b5d2 test_out/05.txt 10
bd16940c302ef9ed31400029db66775a test_out/06.txt 10
d56c49f6f3ad58f6711275781d9cdbb9 test_out/07.txt 10
db67058a98ec542c1f34bb0de89f82a2 test_out/08.txt 10
d2b27a7515e422d0aadaf56d2476624d test_out/09.txt 10
faa9ce1d2d9a0fed127723ea737ef113 test_out/10.txt 10
1654a8c8c9a701d9af1d3225f806c8ea test_in/01.txt 11
cb22401e804a0f9f8a2b4cd1148cdb59 test_in/02.txt 11
5a1d23af7e280fd3311db856a09d1589 test_in/03.txt 11
953bda33c0737b70e0ebfd7a62eff011 test_in/04.txt 11
fb4801ff7e42a6ab32df6121833402f8 test_in/05.txt 11
769a804887b4cd8531d7a260e62e1e15 test_in/06.txt 11
02e391672b973f45ad99d5c39f489c08 test_in/07.txt 11
516d0754abe4ed0519ecdef06ac691ba test_in/08.txt 11
1e105907749179a4091d813c2ee8e98d test_in/09.txt 11
1683c60e44aa346186f06a3f1fc29340 test_in/10.txt 11
1dcca23355272056f04fe8bf20edfce0 test_out/01.txt 11
66a7c1d5cb75ef2542524d888fd32f4a test_out/02.txt 11
08c61f3fd48f12fa7c88a7f5fd01df3d test_out/03.txt 11
6d7fce9fee471194aa8b5b6e47267f03 test_out/04.txt 11
31071d3c9c5921b209385052ece41603 test_out/05.txt 11
897316929176464ebc9ad085f31e7284 test_out/06.txt 11
7da9bb030980c58adb5b185eb9b0ae88 test_out/07.txt 11
18f13f82a879537984457c7124c7d61e test_out/08.txt 11
92f10d5bc80abba38aeb83e8a707c144 test_out/09.txt 11
19c08777e82490aae73c102ca116b5db test_out/10.txt 11
bff03983d6adf93605e5627d535108fe test_in/01.txt 12
63fcd32a7cc5c631821b552f823b69c7 test_in/02.txt 12
0a1a4402784a4f0d9b0a5dbda86bfc0b test_in/03.txt 12
14e6469a6cbe01e2d14788323cda5278 test_in/04.txt 12
8fbdf6ae76ffc51b09ce4972da1b9819 test_in/05.txt 12
1484f8f594234ef7b119f953de149356 test_in/06.txt 12
631cf67970a7299a92d5ef63a4b45ba4 test_in/07.txt 12
502081f9875f784ace998491e4cca783 test_in/08.txt 12
a5133e8758226b016795d3a3f8ff0b86 test_in/09.txt 12
a9f25ae34090d314b42ff6cc2557430d test_in/10.txt 12
26ab0db90d72e28ad0ba1e22ee510510 test_out/01.txt 12
dc35b9fd881cc59bf54338af51a41c6e test_out/02.txt 12
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6ba7a46b681801a9fbf3215f45ac7a16 test_out/10.txt 19
4c364b8caeb9c56abc9a03bc63c5959a test_in/01.txt 20
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3dc31179cfa2da90e6a47f68486a132e test_in/04.txt 20
2a6e56572624997949ef6425ac80ee88 test_in/05.txt 20
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6dc97ae26910c63d16220b23bf2b0358 test_in/07.txt 20
968b17fad55dd5d4e7e524f97d7c30a8 test_in/08.txt 20
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82b6dcdb2898a06ffb1bb38bc8fe4ecb test_in/10.txt 20
21da93069c74dfbc3c02999e8f27a712 test_out/01.txt 20
21da93069c74dfbc3c02999e8f27a712 test_out/02.txt 20
19541a2746e08a6b8f5145bdbaa23e45 test_out/03.txt 20
19541a2746e08a6b8f5145bdbaa23e45 test_out/04.txt 20
21da93069c74dfbc3c02999e8f27a712 test_out/05.txt 20
21da93069c74dfbc3c02999e8f27a712 test_out/06.txt 20
19541a2746e08a6b8f5145bdbaa23e45 test_out/07.txt 20
21da93069c74dfbc3c02999e8f27a712 test_out/08.txt 20
19541a2746e08a6b8f5145bdbaa23e45 test_out/09.txt 20
19541a2746e08a6b8f5145bdbaa23e45 test_out/10.txt 20
EOS";

void main(string[] args) {
	bool[int][string] ids;
	foreach (datum; DATA.split("\n")) {
		const tokens = datum.split(" ");
		if (tokens.length == 3) {
			if (tokens[0] !in ids) {
				ids[tokens[0]] = null;
			}
			ids[tokens[0]][tokens[2].to!int] = true;
		}
	}
	
	string input;
	for (string line; (line = readln) != null; ) {
		input ~= line;
	}
	const md5 = input.md5Of.toHexString!(LetterCase.lower);
	// writeln(ids[md5.to!string].keys.sort.to!string.removechars("[],"));
  import std.array;
  const ans = ids[md5.to!string].keys.sort.array;
  writeln(ans.length);
  foreach (index, i; ans) {
    if (index > 0) write(" ");
    write(i);
  }
  writeln();
}