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

// in_subnet validates whether an IPv4 address belongs to a subet.
int in_subnet(const char *address, const char *subnet) {

  // TODO: vas kod tu

}


int main(void) {
	int N=102, l;
	char str[N], addr[N], subnet[N], *ret;
	while(ret = fgets(str, sizeof(str), stdin)) {	// includes trailing \n
		l=strnlen(str, N);
		if (l-- && (str[l]=='\n')) str[l]=0;
		if (sscanf(str, "a %s s %s", addr, subnet) != 2) break;
		printf("%s\n", in_subnet(addr, subnet)?"yes":"no");
	}
	return 0;
}