import java.util.*;
public class S2 {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int x = Integer.parseInt(s.nextLine());
        for(int i = 0; i < x; i++) {
            String[] A = new String[4];
            for(int j = 0; j < 4; j++) {
                String r = s.nextLine().toLowerCase();
                int k = lastVowel(r);
                if(k == -1)
                    A[j] = r;
                else if(k == r.length() - 1)
                    A[j] = "";
                else
                A[j] = r.substring(k, r.length() - 1);
            }
            if(A[0].equals(A[2]) && A[0].equals(A[1]) && A[0].equals(A[3]))
                System.out.println("perfect");
            else if (A[0].equals(A[1]) && A[2].equals(A[3]))
                    System.out.println("even");
            else if (A[0].equals(A[2]) && A[1].equals(A[3]))
                    System.out.println("cross");
            else if (A[0].equals(A[3]) && A[1].equals(A[2]))
                    System.out.println("shell");
            else System.out.println("free");
        }
    }
    static int lastVowel(String s) {
        for(int i = s.length(); i > 0; i--) {
            switch(s.charAt(i - 1)) {
                case ' ': return i - 1;
                case 'a': return i - 1;
                case 'e': return i - 1;
                case 'i': return i - 1;
                case 'o': return i - 1;
                case 'u': return i - 1;
            }
        } return -1;
    }
}