public static void main ( String [ ] args ) throws IOException {
  Scanner input = new Scanner ( System . in ) ;
  int n = input . nextInt ( ) ;
  String a [ ] = {
    "vaporeon" , "jolteon" , "flareon" , "espeon" , "umbreon" , "leafeon" , "glaceon" , "sylveon" };
    String s = input . next ( ) ;
    int count = 0 ;
    for ( int i = 0 ;
    i < s . length ( ) ;
    i ++ ) {
      if ( s . charAt ( i ) >= 'a' && s . charAt ( i ) <= 'z' ) {
        count ++ ;
      }
    }
    for ( String string : a ) {
      if ( string . length ( ) == n ) {
        int now = 0 ;
        for ( int i = 0 ;
        i < n ;
        i ++ ) {
          if ( string . charAt ( i ) == s . charAt ( i ) ) {
            now ++ ;
          }
        }
        if ( now == count ) {
          System . out . println ( string ) ;
          return ;
        }
      }
    }
  }
  
public static void main ( String [ ] args ) throws IOException { Scanner input = new Scanner ( System . in ) ; int n = input . nextInt ( ) ; String a [ ] = { " vaporeon " , " jolteon " , " flareon " , " espeon " , " umbreon " , " leafeon " , " glaceon " , " sylveon " } ; String s = input . next ( ) ; int count = 0 ; for ( int i = 0 ; i < s . length ( ) ; i ++ ) { if ( s . charAt ( i ) >= ' a ' && s . charAt ( i ) <= ' z ' ) { count ++ ; } } for ( String string : a ) { if ( string . length ( ) == n ) { int now = 0 ; for ( int i = 0 ; i < n ; i ++ ) { if ( string . charAt ( i ) == s . charAt ( i ) ) { now ++ ; } } if ( now == count ) { System . out . println ( string ) ; return ; } } } }
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