#include <bits/stdc++.h>

using namespace std;

bool die[3][3];

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	int amount = 0;
	
	for(int i = 0; i < 3; ++i)
	{
		for(int j = 0; j < 3; ++j)
		{
			char a;
			cin >> a;
			
			if(a == 'o')
			{
				die[i][j] = 1;
				++amount;
			}
		}
	}
	
	switch(amount)
	{
		case 1:
			if(die[1][1])
			{
				cout << 1;
			}
			else
			{
				cout << "unknown";
			}
			return 0;
		case 2:
			if((die[0][0] && die[2][2]) || (die[2][0] && die[0][2]))
			{
				cout << 2;
			}
			else
			{
				cout << "unknown";
			}
		
			return 0;
		
		case 3:
			if(die[1][1] && ((die[0][0] && die[2][2]) || (die[0][2] && die[2][0])))
			{
				cout << 3;
			}
			else
			{
				cout << "unknown";
			}
			return 0;
			
		case 4: 
			if((die[0][0] && die[2][2]) && (die[0][2] && die[2][0]))
			{
				cout << 4;
			}
			else
			{
				cout << "unknown";
			}
			
			return 0;
		
		case 5: 
			if(die[1][1] && ((die[0][0] && die[2][2]) && (die[0][2] && die[2][0])))
			{
				cout << 5;
			}
			else
			{
				cout << "unknown";
			}
			
			return 0;
			
		case 6: if((die[0][0] && die[2][2]) && (die[0][2] && die[2][0]) && ((die[0][1] && die[2][1]) || (die[1][0] && die[1][2])))
		{
			cout << 6;
		}
		else
		{
			cout << "unknown";
		}
		
		return 0;
			
		default:
			cout << "unknown";
			break;
	}


	return 0;
}