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

int main(int argc, char *argv[])
{
   char *str1, *str2, *token, *subtoken;
   char *saveptr1, *saveptr2;
   int j;

   if (argc != 4) {
       fprintf(stderr, "Usage: %s string delim subdelim\n",
               argv[0]);
       exit(EXIT_FAILURE);
   }

   for (j = 1, str1 = argv[1]; ; j++, str1 = NULL) {
       token = strtok_r(str1, argv[2], &saveptr1);
       if (token == NULL)
           break;
       printf("%d: %s\n", j, token);

       for (str2 = token; ; str2 = NULL) {
           subtoken = strtok_r(str2, argv[3], &saveptr2);
           if (subtoken == NULL)
               break;
           printf(" --> %s\n", subtoken);
       }
   }

   exit(EXIT_SUCCESS);
}