#include <iostream>
#include <string>
#include <utility>
#include <algorithm>
#include <map>
#include <set>
#include <vector>
#include <cmath>
#include <cstdlib>
#include <queue>
#include <stack>
#include <iomanip>
#include <fstream>
#include <unordered_map>
#include <unordered_set>
#include <assert.h>
using namespace std;


#define REP(i, n) for(ll i = 0;i < n;i++)
#define REPR(i, n) for(ll i = n;i >= 0;i--)
#define FOR(i, m, n) for(ll i = m;i < n;i++)
#define FORR(i, m, n) for(ll i = m;i >= n;i--)
#define REPO(i, n) for(ll i = 1;i <= n;i++)
#define ll long long
#define INF (ll)1 << 60
#define MINF (-1 * INF)
#define ALL(n) n.begin(),n.end()
#define MOD 1000000007
#define P pair<ll, ll>

string s[50] = {
		"01_D0_U_Th1nk_Ab0ut_M3?",
		"02_Pu5h_TWO_4nd_y0U_w1N",
		"03_Dfs_1s_/N0T/_D3F3nS3",
		"04_G0n_H5_G0n3_tR463D1c",
		"05_I_H4v3_0N7y_52yen_:(",

		"06_7an6Ue_CH0CO_D3_chat",
		"07_The_Catcher_inda_Rye",
		"08_D15j01nt_Sp4r53T4b73",
		"09_sH1R0t4n_m0FuFu_m0Fu",
		"10_U_cANn0t_e5C4p3_Fr0M",

		"11_m4nG0_K41d0Ku_is_Fun",
		"12_m3Tr0p071t4n_mU534m.",
		"13_8:07_Nozomi207_10:33",
		"14_0uR_pR4ys_R_w1th_y0u",
		"15_J4ga+AR4_r0Ck'n'r077",

		"16_m0r1TUr1_t3_547uT4Nt",
		"17_C74ud1u5:_\"Aut_non.\"",
		"18_w1d3_5u63Rc4N3_f1E7d",
		"19_D15c0rD[1]_@eV3rY0Ne",
		"20_37135_Mar1e_C4r07in3",

		"21_in_Br1da7_V3i7_Fa77s",
		"22_y0ur_t34rs...r_T45Ty",
		"23_pH5.6orLess_acidrain",
		"24_m0u_oNi-ch4n_no_BAKA",
		"25_\"B3-cUz_1t's_tH3r3.\"",

		"26_But_Wh4t_ha5_h3_d0n3",
		"27_3uPh0r1c_R3v07Ut10n!",
		"28_it's_A>>_UR_F4U7T_D:",
		"29_4_Wh0m_theB37l_t07ls",
		"30_Buffet's_needle_prob",

		"31_A_s3cr3t_m4k3s_a_...",
		"32_...woman_woman.x0u0x",
		"33_Making_flags_was_FUN",
		"34_I/-O-\\I_2018_Japan'2",
		"35_:):):):):):):):):):)",

		"36_n1n63n_d0M0_Y0_D4y0!",
		"37_n1nJ1n_d0M0j4n_OH0-!",
		"38_Chr0n05tA5i5_s133145",
		"39_T3l7_uR_w0RlD_M4sT3R",
		"40_<o>_<O>_<()>_<0>_<o>",

		"41_3c741r_g0nna_h1t_you",
		"42_//Mi7Ky_W4y_6474Xy//",
		"43_Just8Ry2YjIyt7RRXU24",
		"44_0secH1_0secH1_0seXXX",
		"45_[C_5H_4NC_4H_7NCH_3]",

		"46_R34dy,SET,w8a_second",
		"47_NOctuRnus,_Skrjab1n.",
		"48_nam3+4R4_M4ng3cKy0~~",
		"49_w4rN1n6_0f_a_w4rM1n6",
		"50_HALFLIFE_3_CONFIRMED"
};
int main() {
	cout << "flag{45_[C_18H_27NO_3]}" << endl;
}