#include <cstdio>

#include <algorithm>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <iostream>
#include <string>


#define vv_bool vector<vector<bool> >
using namespace std;

bool check_dice(vv_bool &a, vv_bool &b) {
	for(int i = 0; i < 3; i++) {
		for(int j = 0; j < 3; j++) {
		if (a[i][j] != b[i][j]) {
			return false;			
		}
	}	
	}
	return true;
}

bool check_dices(vv_bool &die) {
	vv_bool one(3,vector<bool>(3,false));
	one[1][1] = true;
	
	if (check_dice(die, one)) {
		cout << "1\n";
		return true;	
	}

	vv_bool two_1(3,vector<bool>(3,false));
	two_1[0][0] = true;
	two_1[2][2] = true;
	
	if (check_dice(die, two_1)) {
		cout << "2\n";
		return true;	
	}

	
	vv_bool two_2(3,vector<bool>(3,false));
	two_2[0][1] = true;
	two_2[1][0] = true;
	
	if (check_dice(die, two_2)) {
		cout << "2\n";	
		return true;
	}

	vv_bool three_1(3,vector<bool>(3,false));
	three_1[0][0] = true;
	three_1[2][2] = true;
	three_1[1][1] = true;

	if (check_dice(die, three_1)) {
		cout << "3\n";
		return true;
	}

	
	vv_bool three_2(3,vector<bool>(3,false));
	three_2[0][2] = true;
	three_2[2][0] = true;
	three_2[1][1] = true;

	if (check_dice(die, three_2)) {
		cout << "3\n";	
		return true;
	}

	
	vv_bool four(3,vector<bool>(3,false));
	four[0][0] = true;
	four[2][0] = true;
	four[0][2] = true;
	four[2][2] = true;

	if (check_dice(die, four)) {
		cout << "4\n";	
		return true;
	}

	vv_bool five(3,vector<bool>(3,false));
	five[0][0] = true;
	five[2][0] = true;
	five[0][2] = true;
	five[2][2] = true;
	five[1][1] = true;

	if (check_dice(die, five)) {
		cout << "5\n";	
		return true;
	}

	vv_bool six(3,vector<bool>(3,false));
	six[0][0] = true;
	six[2][0] = true;
	six[0][2] = true;
	six[2][2] = true;
	six[1][0] = true;
	six[1][2] = true;

	if (check_dice(die, six)) {
		cout << "6\n";	
		return true;
	}

		vv_bool six_2(3,vector<bool>(3,false));
	six_2[0][0] = true;
	six_2[2][0] = true;
	six_2[0][2] = true;
	six_2[2][2] = true;
	six_2[0][1] = true;
	six_2[2][1] = true;

	if (check_dice(die, six_2)) {
		cout << "6\n";	
		return true;
	}
	cout << "unknown\n";
	return false;


}



int main() {

	vv_bool input(3,vector<bool>(3,false));
	
	for(int i = 0; i < 3; i++) {
		string temp;
		cin >> temp;
		input[i][0] = temp[0] == 'o';	
		input[i][1] = temp[1] == 'o';	
		input[i][2] = temp[2] == 'o';	
	}

	check_dices(input);
	
	
	return 0;
}