#include <iostream>
#include <string>

void solve() {
    std::string s;
    std::cin >> s;
    int n = s.length();

    auto ans = s;
    for (int j = 0; j < n; ++j) {
        for (int i = 0; i < j; ++i) {
            std::swap(s[i], s[j]);
            if (s > ans) ans = s;
            std::swap(s[i], s[j]);
        }
    }

    std::cout << ans << std::endl;
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}