
A,B = map(str, input().split())
a= []
for i in range(len(A)):
a.append(A[i])
b= []
for i in range(len(B)):
b.append(B[i])
a.reverse()
b.reverse()
a1 = ''.join(a)
b1 = ''.join(b)
print(max(a1,b1))
a,b = input().split()
a = int(a[::-1]) # [::-1] : 역순
b = int(b[::-1])
print(max(a,b))
이렇게 간단히도 됨 ㅎ