#include <string >
#include <vector>
#include <iostream>

using namespace std;


int main()
{
    char a[12][12];
    int count[5];
    for (int i = 0; i < 5; i++)
        count[i] = 0;
    int v, len, k, z, one = 0;
    for (int i = 0; i < 12; i++)
        for (int j = 0; j < 12; j++)
            if (i == 0 || j == 0 || i == 11 || j == 11)
                a[i][j] = '.';
            else
                cin >> a[i][j];
    for (int i = 1; i < 11; i++)
        for (int j = 1; j < 11; j++)
            if (a[i][j] == 'X')
                if (a[i - 1][j] == 'X' || a[i + 1][j] == 'X')
                    if (a[i][j - 1] == 'X' || a[i][j + 1] == 'X')
                    {
                        cout << "NO";
                        return 0;
                    }
    for (int i = 1; i < 11; i++)
        for (int j = 1; j < 11; j++)
            if (a[i][j] == 'X')
                for (a[i][j] = 'A', v = -1; v < 2; v++)
                    for (int h = -1; h < 2; h++)
                        if (a[i + v][j + h] != '.')
                        {
                            if (!(v < 0 && h == 0 || h < 0 && v == 0) && (h < 0 || v < 0 || h && v))
                            {
                                cout << "NO";
                                return 0;
                            }
                            for (len = 1, k = i + v, z = j + h; a[k][z] == 'X'; k += v, z += h)
                            {
                                if (len > 4)
                                {
                                    cout << "NO";
                                    return 0;
                                }
                                a[k][z] = 'A';
                                len++;
                            }
                            if (len > 1)
                                one++;
                            count[len]++;
                        }
    count[1] -= one;
    if (count[1] != 4 || count[2] != 3 || count[3] != 2 || count[4] != 1)
        cout << "NO";
    else
        cout << "YES";
}