#include <iostream>
#include <string>

using namespace std;

string S;

int main() {
	cin >> S;
	string res = S;
	for (int i = 0; i < S.length(); i++) {
		for (int j = i + 1; j < S.length(); j++) {
			char tmp = S[i]; S[i] = S[j]; S[j] = tmp;
			if (S > res) {
				res = S;
			}
			tmp = S[i]; S[i] = S[j]; S[j] = tmp;
		}
	}
	cout << res << endl;
	return 0;
}