#include <stdio.h>#include <iostream.h>#include <string.h>int fun(char a){ if(a=='a'||a=='A'||a=='e'||a=='i'||a=='o'||a=='u'||a=='E'||a=='I'||a=='O'||a=='U')  return 1; else  return 0;}int main(){ int n,i,j,k; char s[4][100]; char ss[4][100]; int pos; int black; cin>>n; for(i=0;i<n;i++) {  for(j=0;j<4;j++)  gets(s[j]);    for(j=0;j<4;j++)  {   black=0;   pos=strlen(s[j])-1;   while(s[j][pos]==' ')   {    pos--;    black++;   }   while(s[j][pos]!=' ' && fun(s[j][pos])==0 && pos>0)    pos--;   if(s[j][pos]==' ')    pos++;   for(k=0;k<strlen(s[j])-pos-black;k++)   {    if(s[j][pos+k]<='Z' && s[j][pos+k]>='A')     ss[j][k]=s[j][pos+k]-'A'+'a';    else     ss[j][k]=s[j][pos+k];   }  ss[j][strlen(s[j])-pos-black]='\0';  }  if(strcmp(ss[0],ss[1])==0 && strcmp(ss[2],ss[3])==0)  {   if(strcmp(ss[0],ss[2])==0)    cout<<"perfect\n";   else    cout<<"even\n";  }  else if(strcmp(ss[0],ss[2])==0 && strcmp(ss[3],ss[1])==0)  {   cout<<"cross\n";  }  else if(strcmp(ss[0],ss[3])==0 && strcmp(ss[2],ss[1])==0)  {   cout<<"shell\n";  }  else   cout<<"free\n"; } return 0; }

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