import urllib2

def query(url):
    res = urllib2.urlopen(url)
    return res.read()

url = "http://www.geocities.jp/unko_der/sample_01.txt"
result = query(url)
result = "3"+result.lstrip("2")
s = raw_input()
for i in range(200002):
    if (result[i] != s[i]):
        print s[i],
        print result[i]
        break