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

char *charset;
int *buffer, len, max;

void printchar() {
  int i;
  for (i = 0; i < len; ++i)
    putchar(charset[buf[i]]);
  putchar('\n');
}

int next() {
  int i;
  for ( i = 0; i < len; ++i)
    if (++buffer[i] < max) return 1;
    else buffer[i] = 0;
  return 0;
}

int main(int argc, char *argv[]) {
  set = argv[1];
  max = strlen(charset);
  len = atoi(argv[2]);
  buf = calloc(len, sizeof(int));
 
  do printchar(); while (next());
  return 0;
}