#include <cstdio>
#include <iostream>
#include <algorithm>
#include <cstring>
#include <cmath>
#include <vector>
#define pb push_back

using namespace std;

vector<int>avion;

int main(){
    string aero;
    for(int i=0; i<5; i++){
        cin >> aero;
        if(aero.find("FBI")!=-1) avion.pb(i+1);
    }
    if(avion.empty()) cout << "UTEKO";
    for(int i=0; i<avion.size(); i++) cout << avion[i] << " ";
    cout << endl;



    return 0;
}