def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))

def main():
    mod=10**9+7
    S="abcdefghijklmnopqrstuvwxyz"
    T=input()
    
    for i in range(26):
        if T[i]!=S[i]:
            X=S[i]
            Y=T[i]
    L=[X,"to",Y]
    print(''.join(map(str,L)))


main()