#include <bits/stdc++.h>
using namespace std;

int main() {
	int n, m;
	cin >> n >> m;
	for (int i = 0; i <= n; i++) {
		for (int j = 0; j <= n; j++) {
			if (j * 4 + i * 2 == m && j + i == n) {
				cout << "xiang:" << j << " niao:" << i;
			}
		}
	}
}