#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 + j] = 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;
}



/*
#include <iostream>

using namespace std;

/*
 * 
 */
int main(int argc, char** argv) {
    map<char, int> valToRank;
    valToRank.insert('2', 2);
    valToRank.insert('3', 3);
    valToRank.insert('4', 4);
    valToRank.insert('5', 5);
    valToRank.insert('6', 6);
    valToRank.insert('7', 7);
    valToRank.insert('8', 8);
    valToRank.insert('9', 9);
    valToRank.insert('10', 10);
    valToRank.insert('J', 10);
    valToRank.insert('Q', 10);
    valToRank.insert('K', 10);
    valToRank.insert('A', 10);
    char arr[5][2]; // num card
    for (int i = 0; i < 5; i++) {
        string k;
        cin >> k;
        arr[i][0] = k[0];
        arr[i][1] = k[1];
    }
    return 0;
}

*/