#include <sys/socket.h>

#include <netinet/in.h>
#include <arpa/inet.h>

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

int main(int argc, char **argv)
{
	char str[INET6_ADDRSTRLEN + 5];
	struct in6_addr addr;
	int ret, bits;

	memset(&addr, 0, sizeof(addr));
	ret = inet_net_pton(AF_INET6, argv[1], &addr, sizeof(addr));
	if (ret == -1)
		err(1, "%s", argv[1]);

	inet_ntop(AF_INET6, &addr, str, sizeof(str));
	printf("%s/%d\n", str, ret);

	ret = inet_cidr_pton(AF_INET6, argv[1], &addr, &bits);
	if (ret == -1)
		err(1, "%s", argv[1]);

	inet_ntop(AF_INET6, &addr, str, sizeof(str));
	printf("%s/%d\n", str, bits);

	return 0;
}