from urllib import urlopen

s = raw_input()

url = urlopen('http://www.geocities.jp/unko_der/sample_01.txt')
html = url.read()
print(html[:1000])
if s[0] != '3':
    print("%s 3" % s[0])
else:
    for (a, b) in zip(s[2:], html[2:]):
        if a != b:
            print("%s %s" % (a, b))
            break