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

using namespace std;

int n = 10;
vector<string> matrix;

bool corner(int i, int j)
{
    if ((j + 1 < n) && (i + 1 < n) && matrix[i][j] == 'X' && matrix[i][j + 1] == 'X' && matrix[i + 1][j] == 'X')
        return false;
    if ((j - 1 > -1) && (i + 1 < n) && matrix[i][j - 1] == 'X' && matrix[i][j] == 'X' && matrix[i + 1][j] == 'X')
        return false;
    if ((j - 1 > -1) && (i - 1 > -1) && matrix[i][j - 1] == 'X' && matrix[i][j] == 'X' && matrix[i - 1][j] == 'X')
        return false;
    if ((j + 1 < n) && (i - 1 > -1) && matrix[i][j + 1] == 'X' && matrix[i][j] == 'X' && matrix[i - 1][j] == 'X')
        return false;
    return true;
}

bool zone(int i, int j)
{
    if ((i + 1 < n) && (j - 1 > -1) && matrix[i + 1][j - 1] == 'X' && matrix[i][j] == 'X')
        return false;
    if ((i + 1 < n) && (j + 1 < n) && matrix[i + 1][j + 1] == 'X' && matrix[i][j] == 'X')
        return false;
    return true;
}

int height(int i, int j)
{
    int result = 0;
    if(matrix[i][j] == 'X' && (j + 1 >= n || matrix[i][j + 1] == '.'))
    {
        while(i < n && matrix[i][j] == 'X')
        {
            result++;
            matrix[i][j] = '.';
            i++;
        }
    }

    return result;
}

int width(int i, int j)
{
    int result = 0;
    if(matrix[i][j] == 'X' && (i + 1 >= n || matrix[i + 1][j] == '.'))
    {
        while(j < n && matrix[i][j] == 'X')
        {
            result++;
            matrix[i][j] = '.';
            j++;
        }
    }

    return result;
}


int main()
{

    string s;
    for(int i = 0; i < n; i++)
    {
        cin >> s;
        matrix.push_back(s);
    }

    int stage[11] = {0};
    for(int i = 0; i < n; i++)
        for(int j = 0; j < n; j++)
        {
            if (corner(i, j) == 0 || zone(i, j) == 0)
            {
                cout << "NO\n";
                return 0;
            }
            int current = max(height(i, j), width(i, j));
            stage[current]++;
        }

    if(stage[1] == 4 && stage[2] == 3 && stage[3] == 2 && stage[4] == 1 && stage[5] == 0 && stage[6] == 0 && stage[7] == 0 && stage[8] == 0 && stage[9] == 0 && stage[10] == 0)
        cout << "YES\n";
    else
        cout << "NO\n";

    return 0;
}