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//
// See https://theweeklychallenge.org/blog/perl-weekly-challenge-154
//
//
// Run as: ln ch-1.java ch1.java; javac ch1.java; java ch1 < input-file
//
import java.util.*;
public class ch1 {
public static void main (String [] args) {
String [] p = {"PERL", "PELR", "PREL", "PRLE", "PLER", "PLRE",
"EPRL", "EPLR", "ERPL", "ERLP", "ELPR", "ELRP",
"REPL", "RELP", "RPEL", "RPLE", "RLEP", "RLPE",
"LERP", "LEPR", "LREP", "LRPE", "LPER", "LPRE"};
Scanner scanner = new Scanner (System . in);
while (scanner . hasNextLine ()) {
String line = scanner . nextLine () . trim ();
for (int i = 0; i < 24; i ++) {
if (p [i] . equals (line)) {
p [i] = "";
}
}
}
for (int i = 0; i < 24; i ++) {
if (p [i] != "") {
System . out . println (p [i]);
}
}
}
}
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