s1,s2 = input().split()
S1 = ''
S2 = ''
for i in range(len(s1)):
S1 = S1 + (s1[2-i])
for i in range(len(s2)):
S2 = S2 + (s2[2-i])
if(int(S1)>int(S2)):
print(S1)
else:
print(S2)
[::-1] 가 역순이래
이거쓰면 편함
https://ooyoung.tistory.com/72
https://itholic.github.io/python-reverse-string/