import sys


def input(): return sys.stdin.readline().rstrip()


def main():
    N = input()
    ans = N
    for i in range(len(N)):
        for j in range(i+1, len(N)):
            ans = max(ans, N[:i] + N[j] + N[i+1:j] + N[i] + N[j+1:])
    print(ans)


if __name__ == '__main__':
    main()