n = int(input())
sw = n // 100000 % 10
w = n // 10000 % 10
q = n // 1000 % 10
b = n // 100 % 10
s = n // 10 % 10
g = n // 1 % 10
x = sw * 100 + w * 10 + q
y = b * 100 + s * 10 + g
if x > y:
    print(n)
else:
    print(b * 100000 + s * 10000 + g * 1000 + sw * 100 + w * 10 + q)

/**************************************************************
	Problem: 1631
	User: admin
	Language: Python
	Result: Accepted
	Time:118 ms
	Memory:34480 kb
****************************************************************/