#include <cstdio>
#include <cstdint>
#include <cassert>
#include <stdexcept>

class CidrBlock4 {
	uint32_t val, begin, end, mask;
	uint8_t cidr;
	void _init(uint8_t a, uint8_t b, uint8_t c, uint8_t d, uint8_t cidr) {
        if (cidr > 32) throw std::runtime_error("Invalid CIDR");
		this->cidr = cidr;
		for (uint8_t i = 0, cnt = cidr; i < 32; i++) {
			this->mask <<= 1;
			if (cnt) this->mask |= 1, cnt--;
		}
		this->val = ((a << 24) | (b << 16) | (c << 8) | d);
		this->begin = this->val & this->mask;
		this->end = this->begin | (~(this->mask));
	}
public:
	CidrBlock4(char* const &ip) {
		uint8_t a, b, c, d, cidr;
		int ret = sscanf(ip, "%hhu.%hhu.%hhu.%hhu/%hhu", &a, &b, &c, &d, &cidr);
        if (ret != 5) throw std::runtime_error("Failed parsing, invalid parameters");
		_init(a, b, c, d, cidr);
	}
	CidrBlock4(uint8_t a, uint8_t b, uint8_t c, uint8_t d, uint8_t cidr) {
		_init(a, b, c, d, cidr);
	}
	~CidrBlock4() {}

	int dump() {
#define _toDotSplitDec(x) (x & 0xff000000u) >> 24, (x & 0x00ff0000u) >> 16, (x & 0x0000ff00u) >> 8, (x & 0x000000ffu)
		return fprintf(stderr,
				"Block %u.%u.%u.%u/%hhu, from %u.%u.%u.%u to %u.%u.%u.%u, masked by %u.%u.%u.%u\n", 
				_toDotSplitDec(val), cidr,
				_toDotSplitDec(begin),
				_toDotSplitDec(end),
				_toDotSplitDec(mask)
			);
#undef _toDotSplitDec
	}
};

int main(int argc, char const *argv[]) {
	uint8_t a, b, c, d, e;
    while (scanf("%hhu.%hhu.%hhu.%hhu/%hhu", &a, &b, &c, &d, &e) != EOF) {
		CidrBlock4(a, b, c, d, e).dump();
	}
	return 0;
}