#include<iostream>
#include<string>
using namespace std;
int main ()
{
	
	string s1[5];
	basic_string <char>::size_type s2[5];
	bool uteko=true;

	for(int i=0;i<5;i++){
	cin>>s1[i];
	}
	for(int i=0;i<5;i++)
	{
		s2[i]=s1[i].find("FBI",0);
		if(s2[i] != string::npos){cout<<i+1<<" ";uteko=false;}

	}
	if(uteko)cout<<"UTEKO"<<endl;
	
	

return 0;
}