#include <iostream>
using namespace std;

int main()
{
    int row;
    char column;
    char answer;
    char arr[8][5];
    int i;
    int k;
    for(i = 1; i < 8; i++)
    {
        arr[i][1] = 'A';
        arr[i][2] = 'B';
        arr[i][3] = 'C';
        arr[i][4] = 'D';
    }

    for(i = 1; i < 8; i++)
    {
        cout << i << " ";
        for(k = 1; k< 5; k++)
        {
            cout << arr[i][k] << " ";
        }
        cout << endl;
    }
    do
    {

        cin >> row;
        if(row < 1 || row > 7)
        {
            cout << endl << "Error, please select the correct row" << endl << endl;;
        }
        cin >> column;
        switch(column)
        {
            case 'A':
            case 'a':
                static_cast<int>(column);
                column = 1;
                break;
            case 'B':
            case 'b':
                static_cast<int>(column);
                column = 2;
                break;
            case 'C':
            case 'c':
                static_cast<int>(column);
                column = 3;
                break;
            case 'D':
            case 'd':
                static_cast<int>(column);
                column = 4;
                break;
        }


        if(arr[row][column] == 'x')
        {
            cout << "Error, seat already taken" << endl;
        }
        else
        {
            arr[row][column] = 'x';
        }

        for(i = 1; i < 8; i++)
        {
            cout << i << " ";
            for(k = 1; k< 5; k++)
            {
                cout << arr[i][k] << " ";
            }
            cout << endl;
        }
        cout << "Repeat? Y/N" << endl;
        cin >> answer;
    }while(answer == 'Y' || answer == 'y');
}