/*************************************************************************
 *  Compilation:  javac Dragon.java
 *  Execution:    java Dragon N
 *  
 *  Prints the instructions for drawing a dragon curve of orders N.
 * 
 *  % java Dragon 0
 *  F
 * 
 *  % java Dragon 1
 *  FLF
 * 
 *  % java Dragon 2
 *  FLFLFRF
 * 
 *  % java Dragon 3
 *  FLFLFRFLFLFRFRF
 * 
 *  % java Dragon 4
 *  FLFLFRFLFLFRFRFLFLFLFRFRFLFRFRF
 * 
 *  % java Dragon 5
 *  FLFLFRFLFLFRFRFLFLFLFRFRFLFRFRFLFLFLFRFLFLFRFRFRFLFLFRFRFLFRFRF
 *
 *************************************************************************/

public class Dragon { 
   public static void main(String[] args) { 
      int N = Integer.parseInt(args[0]);
      String dragon = "F";
      String nogard = "F";
      String temp;

      for (int i = 1; i <= N; i++) {
         temp = dragon;                     // save away copy of dragon
         dragon = dragon + "L" + nogard;
         nogard = temp   + "R" + nogard;    // use old value of dragon
      }
      System.out.println(dragon);
   }

}