#include <iostream>
#include <string>
#include <cctype>
using namespace std;

string getSyl(string Line){
    for(int i=0; i<Line.length(); i++){
        Line[i]=tolower(Line[i]);
    }
     string Syl;
     int P = Line.length()-1;
     while (Line[P]!='a'&&Line[P]!='e'&&Line[P]!='o'&&Line[P]!='u'&&Line[P]!='i'&&Line[P]!=' '&&P!=0){
        Syl += Line[P];
        P--;
     }
     Syl = Syl + Line[P];
        P--;
    //cout<<Syl<<endl;
     return Syl;
}

int main() {
    int verses;
    cin >> verses;
    cin.ignore();

    for(int i=0;i<verses;i++){
    string L1;
    getline(cin,L1);
        L1 =getSyl(L1);
    string L2;
    getline(cin,L2);
        L2 = getSyl(L2);
    string L3;
    getline(cin,L3);
        L3 = getSyl(L3);
    string L4;
    getline(cin,L4);
        L4 = getSyl(L4);

    if(L1==L2&&L3==L4&&L1==L3&&L2==L4&&L1==L4&&L2==L3){
        cout<<"perfect"<<endl;
    }else if(L1==L2&&L3==L4&&L1!=L3&&L2!=L4&&L1!=L4&&L2!=L3){
        cout<<"even"<<endl;
    }else if(L1!=L2&&L3!=L4&&L1==L3&&L2==L4&&L1!=L4&&L2!=L3){
        cout<<"cross"<<endl;
    }else if(L1!=L2&&L3!=L4&&L1!=L3&&L2!=L4&&L1==L4&&L2==L3){
        cout<<"shell"<<endl;
    }else{
        cout<<"free"<<endl;
    }

    }
    return 0;
}