#include <iostream>

using namespace std;

int main() {
	bool arr[9];
	bool t[9][9] = 
	{
		{0, 0, 0,
		 0, 1, 0,
		 0, 0, 0},
		{1, 0, 1,
		 0, 0, 0,
		 1, 0, 1},
		{0, 0, 0,
	 	 1, 0, 1,
		 0, 0, 0},
		{0, 1, 0,
		 0, 0, 0,
		 0, 1, 0},
		{1, 0, 1,
		 0, 1, 0,
		 1, 0, 1},
		{0, 0, 1,
		 0, 1, 0,
		 1, 0, 0},
		{1, 0, 0,
	 	 0, 1, 0,
		 0, 0, 1},
		{1, 0, 1,
		 1, 0, 1,
		 1, 0, 1},
		{1, 1, 1,
		 0, 0, 0,
		 1, 1, 1}
	};
	for (int i = 0; i < 9; i++) {
		string k;
		cin >> k;
		for (int j = 0; j < 3; j++) {
			arr[i] = k[j] == 'o' ? true : false;
		}
	}
	bool found;
	for (int i = 0; i < 9; i++) {
		found = true;
		for (int j = 0; j < 9; j++) {
			if (arr[j] != t[i][j]) {
				found = false;
				break;
			}
		}
		if (found) {
			int count = 0;
			for (int j = 0; j < 9; j++) {
				if (arr[j]) count++;
			}
			cout << count << endl;
			return 0;
		}
	}
	cout << "unknown" << endl;
	return 0;
}