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

int main(int argc, char* argv[]) {
	printf("%lu\n", strspn("hello", "hello")); // should be 5
	printf("%lu\n", strspn("world", "wendy")); // should be 1
	printf("%lu\n", strspn("banana", "apple")); // should be 0

    return 0;
}