#include <cstdio>
#include <cstdlib>
#include <iostream>
using namespace std;

void proc(int n, string s)
{
  int top;
  int i, j, index;

  /* Calculate the total number of strings. */

  top = 1;
  for (i = 0; i < n; i++) top *= s.size();

  /* Now, enumerate a separate index for each string.  You
     will calculate the individual characters using div/mod,
     as explained in the enumeration lecture notes.  */

  for (index = 0; index < top; index++) {
    i = index;
    for (j = 0; j < n; j++) {
      printf("%c", s[i%s.size()]);
      i /= s.size();
    }
    printf("\n");
  }
}


int main(int argc, char **argv)
{
  int n;
  string s;
  
  if (argc != 3) {
    fprintf(stderr, "usage: q4 n s\n");
    exit(1);
  }

  n = atoi(argv[1]);
  s = argv[2];
  proc(n, s);
}