#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <string>

using namespace std;


int main(void) {
  bool bio = false;
  string input;
  for ( int i = 0; i < 5; ++i ) {
    cin >> input;
    if ( input.find( "FBI" ) != string::npos ) {
      printf("%d ", i+1);
      bio = true;
    }
  }
  printf( bio ? "\n" : "UTEKO\n" );
  return 0;
}