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

void main(void) {
  srand(9);
  char c1 = 'a' + rand() % 26;
  char c2;
  while ((c2 = 'a' + rand() % 26) == c1);
  printf("%c %c\n", c1, c2);
  char c3;
  while (((c3 = 'a' + rand() % 26) == c1) || (c3 == c2));
  printf("%c %c %c\n", c1, c2, c3);
}