tmp.c

#include <stdio.h>

char * space = "abcdefghijklmnopqrstuvwxyz23456789";

int main(){
    unsigned int total = 0;
    char * end = space+34;
    char *loop1, *loop2, *loop3;
    loop1 = space; 
    for (; loop1 < end; loop1++) {
        loop2 = space;
        for (; loop2 < end; loop2++) {
            loop3 = space;
            for (; loop3 < end; loop3++) {
                total++;
                //printf("%c%c%c\n", *loop1, *loop2, *loop3);
            }
        }
    }
    printf("%u ids found.\n", total);

    return 0;
}