#include <stdio.h>

int any(char s1[], char s2[]);

/* points out the place shere any char from snd arg occurs in fst arg */
int main(int argc, char *argv[])
{
    if (argc <= 2) {
        printf("error : expected two arguments\n");
        return 1;
    }

    int i = any(argv[1], argv[2]);
    if (i < 0)
        printf("No occurence\n");
    else {
        printf("%s\n", argv[1]);
        printf("%*s^\n", i, "");
    }
    return 0;
}

/* any: returns first location in string 's' where char from 'cs' occurs.
 * returns -1 if none occur */
int any(char s[], char cs[])
{
    int i, j;

    for (i = 0; s[i] != '\0'; i++)
        for (j = 0; cs[j] != '\0'; j++)
            if (s[i] == cs[j])
                return i;
    return -1;
}