import java.util.Scanner;

public class Poetry{

  public static void main(String [] args) {
   Scanner s=new Scanner(System.in);
   int verses= s.nextInt();
   char[][] lines= new char[verses*4][];
   String[] rhymeType= new String[verses];
   String[] lastSyllable= new String[verses*4];

   s.nextLine();
   for(int i=0; i< verses*4; i++){
     lines[i]=s.nextLine().toLowerCase().toCharArray();

     for( int o= lines[i].length-1; o>-1; o--){
       if(lines[i][o]=='a'||lines[i][o]=='e'||lines[i][o]=='i'||
          lines[i][o]=='o'||lines[i][o]=='u'||lines[i][o]==' '){
         lastSyllable[i]= new String(lines[i], o, (lines[i].length-1)-o);
         break;
       }
       // have to put this else if here, otherwise one letter lines with no vowel or space will
       // just be skipped past on the first go and not be added into lastSyllable
       else if(lines[i].length==1){
         lastSyllable[i]= new String(lines[i]);
       }
     }
   }

   for(int i=0; i< verses*4; i=i+4){// when comparing objects, use object.equals(object) to test whether values are equal,
                                    // == just tests for reference equality( whether they are same object)
     if(lastSyllable[i].equals(lastSyllable[i+1])&&lastSyllable[i+1].equals(lastSyllable[i+2])&&
        lastSyllable[i+2].equals(lastSyllable[i+3]))
       rhymeType[i/4]="perfect";
     else if(lastSyllable[i].equals(lastSyllable[i+1])&&lastSyllable[i+2].equals(lastSyllable[i+3]))
       rhymeType[i/4]="even";
     else if(lastSyllable[i].equals(lastSyllable[i+2])&&lastSyllable[i+1].equals(lastSyllable[i+3]))
       rhymeType[i/4]="cross";
     else if(lastSyllable[i].equals(lastSyllable[i+3])&&lastSyllable[i+2].equals(lastSyllable[i+1]))
       rhymeType[i/4]="shell";
     else
       rhymeType[i/4]="free";
   }

    for(String xd: rhymeType){
     System.out.println(xd);
    }

  }
}