#include "bits/stdc++.h"
using namespace std;
#define int long long
#define endl '\n'
int mod=1e9+7;
int mod2=998244353;
const int INF=1e9;

signed main(){
  int n;
  cin>>n;
  char a,b;
  cin>>a;
  for(int i=1;i<n;i++){
    cin>>b;
    if(a==b||(a=='F'&&b=='T'))a='T';
    else a='F';
  }
  cout<<a<<endl;
}

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