#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv) {

  int i, j;
  int size;
  char **M;

  if ( argc != 2 )
    return 1;

  size = atoi(argv[1]);

  if ( size < 2 )
    return 1;
  
  M = malloc(size * sizeof(char*));
  for ( i = 0; i < size; i++ )
    M[i] = malloc(size * sizeof(char));

  for ( i = 0; i < size; i++ )
    for ( j = 0; j < size; j++ )
      M[i][j] = '0';

  M[0][0] = 'X';
  M[0][1] = '*';
  M[1][0] = '*'; 

  for ( i = 0; i < size; i++ )
    for ( j = 0; j < size; j++ )
      {
	if ( M[i][j] == '0' )
	  {
	    if ( (i - 1 >= 0) && (M[i-1][j] == '*') )
	      M[i][j] = 'U';
	    else if ( (j - 1 >= 0) && (M[i][j-1] == '*') )
	      M[i][j] = 'L';
	    else if ( (j - 1 >= 0) && (i - 1 >= 0) && (M[i-1][j-1] == '*') )
	      M[i][j] = 'D';
	    else
	      M[i][j] = '*';
	  }
      }
  
  for ( i = 0; i < size; i++ )
    {
      for ( j = 0; j < size; j++ )
	fprintf(stdout, "%c ", M[i][j]);

      fprintf(stdout, "\n");
    }

  for ( i = 0; i < size; i++ )
    free(M[i]);

  free(M);

  return 0;
}