#include <iostream>
#include <vector>
using namespace std;
int main() {
  int n, m;
  cin >> n >> m;
  vector< vector<bool> > v(n, vector<bool> (m));
  for(int i = 1; i < n; ++i)
    v[i][m - 1] = 1;
  for(int i = 0; i < m - 1; ++i)
    v[0][i] = 1;
  vector<bool> vert(m);
  vector<bool> gor(n), diagon(n + m - 1);
  vert[m - 1] = 1;
  gor[0] = 1;
  diagon[m - 1] = 1;
  for(int i = 1; i < n; ++i)
    for(int j = m - 2; j >= 0; --j) {
      if(vert[j] || gor[i] || diagon[i + j])
        v[i][j] = 1;
      else {
        v[i][j] = 0;
        vert[j] = 1;
        gor[i] = 1;
        diagon[i + j] = 1;
      }
    }
  if(v[n - 1][0])
    cout << 'F';
  else
    cout << 'S';
  return 0;
}