原题链接

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#include <bits/stdc++.h>
using namespace std;
const int inf = 0x3f3f3f3f;
int num, res = inf;
void p(int x) {
	for(int i = 0; i < 4; ++i) {
		for(int j = 0; j < 4; ++j) {
			printf("%d", (x >> (4 * i + j)) & 1);
		}
		printf("\n");
	}
	printf("\n");
}
int main() {
	#ifndef ONLINE_JUDGE
	freopen("in.txt", "r", stdin);
	#endif
	for(int i = 0; i < 4; ++i) {
		string s;
		cin >> s;
		for(int j = 0; j < 4; ++j) {
			if(s[j] == '+')
				num |= (1 << (i * 4 + j));
		}
	}
//	p(num);
	int ptr = 0;
	for(int i = 0; i < 1 << 16; ++i) {
		int times = 0;
		int temp = num;
		for(int j = 0; j < 16; ++j) {
			if((i >> j) & 1) {
				times++;
//				p(temp);
				int column = j % 4;
				int row = j / 4;
//				printf("row: %d, column: %d\n", row, column);
				int n = 0xf << (4 * row);
				n |= 0x1111 << column;
				temp ^= n;
				// temp ^= 1 << j;
				//p(temp);
			}
		}
		if(temp == 0 && times < res) {
			res = times, ptr = i;
		}
	}
	printf("%d\n", res);
	for(int j = 0; j < 16; ++j) {
		if((ptr >> j) & 1) {
			printf("%d %d\n", j / 4 + 1, j % 4 + 1);
		}
	}
	return 0;
}