#include <cstdio>
#include <string>
#include <iostream>

using namespace std;

int main()
{
	bool found = false;
	for( int i = 0; i < 5; i++ ) {
		string s;
		cin >> s;
		
		if( s.find( "FBI" ) != string::npos ) {
			printf( "%d ", i+1 );
			found = true;
		}
	}
	
	if( !found ) puts( "UTEKO" );
	putchar( '\n' );
}