#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;

int main()
{
	string s;

	while (1) {
		string s; cin >> s;

		if (count(s.begin(), s.end(), 'T') != 0)cout << "T" << endl;
		else cout << endl;
	}

    return false;
}