#include <iostream>
#include <string>

using namespace std;

int main(){
	
	
	string reg[5];
	basic_string <char>::size_type rez[5];
	bool uteko = true;
	

	for(int i = 0 ; i<5 ; i++){
	
		cin>>reg[i];

	}

	cout<<endl;

	for (int i = 0 ; i<5  ; i++){
	
		rez[i] = reg[i].find("FBI", 0);
		if(rez[i] != string::npos){cout<<i+1<<" "; uteko = false;}
	
	
	}	
	
	if(uteko)cout<<"UTEKO";

	cout<<endl;













return 0;
}