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

int main(void) {
  char sentence[100], word[40], *result;
  
  printf("Enter a sentence: ");
  gets(sentence);
  printf("Enter a word to search: ");
  gets(word);
   
  result = strstr(sentence, word);
  
  if (result != NULL)
    printf("%s was found at index %d\n", word, result-sentence);
  else
    printf("%s was not found\n", word);
  
  return 0;
}