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

int main(void) {
    char str[] = "Hello there; How are you? / I'm good - End";
    char *copy = strdup(str);
    char *delim = ";-/";
    char *res = strtok( str, delim );
    while (res) {
        printf("%c\n", copy[res-str+strlen(res)]);
        res = strtok( NULL, delim );
    }
    free(copy);
    return 0;
}