#include <stdio.h>

char *smaller(char *s1, char *s2)
{
  int i;

  i = strcmp(s1, s2);
  if (i < 0) return s1;
  if (i > 0) return s2;
  return NULL;
}

main()
{
  char s1[100];
  char s2[100];

  while(1) {
    printf("Enter two words:\n");
    if (scanf("%s", s1) != 1) exit(0);
    if (scanf("%s", s2) != 1) exit(0);
    printf("Smaller is %s\n", smaller(s1, s2));
  }
}