#include <bits/stdc++.h>
using namespace std;
int main () {
	string s;
	cin >> s;
	auto D = [](char c) {
		return (c == 'T' ? 0 : (c == 'C' ? 1 : 2));
	};
	sort(s.begin(), s.end(), [&](char a, char b){return D(a) < D(b);});
	bool c = false;
	for (auto& a : s) c = c || (a == 'C');
	if (c) {
		cout << s << endl;
	} else {
		sort(s.begin(), s.end());
		cout <<s << endl;
	}
}