I'm working on a Plane Reservation System in Java, Tha plane has 5 Rows. Each Row has 10 seats. There is a Aisle after 5th seat. In my case, The 1st & last seats are already booked. Consider a person has to book 3 seats next to each other (seats across aisle not allowed). Now I need to return the available seats like (2,3,4 & 3,4,5 & 6,7,8 & 7,8,9)

output.txt

Welcome to the seat reservation system!
1   ABCDE   FGHIJK
2   ABCDE   FGHIJK
3   ABCDE   FGHIJK
4   ABCDE   FGHIJK
5   ABCDE   FGHIJK
6   ABCDE   FGHIJK
7   ABCDE   FGHIJK
8   ABCDE   FGHIJK
9   ABCDE   FGHIJK
10   ABCDE   FGHIJK
There are XX number of seats available.
Enter seat (e.g. 1A) or zero to quit the program.
1A

1   XBCDE   FGHIJK
2   ABCDE   FGHIJK
3   ABCDE   FGHIJK
4   ABCDE   FGHIJK
5   ABCDE   FGHIJK
6   ABCDE   FGHIJK
7   ABCDE   FGHIJK
8   ABCDE   FGHIJK
9   ABCDE   FGHIJK
10   ABCDE   FGHIJK
There are XX number of seats available.
Enter seat to assign (e.g., '1A'), or zero to quit:

Plane.java

import java.util.ArrayList;
import java.util.Scanner;

public class Plane {

    public static void main(String[] args) {
        System.out.println("Welcome to the seat reservation system!");
        char[][] seats = new char [10][11];
        ArrayList<String> reservedSeats = new ArrayList<>();
        for (int i=0;i<10;i++){
            seats[i][0] = 'A';
            seats[i][1] = 'B';
            seats[i][2] = 'C';
            seats[i][3] = 'D';
            seats[i][4] = 'E';
            seats[i][5] = 'F';
            seats[i][6] = 'G';
            seats[i][7] = 'H';
            seats[i][8] = 'I';
            seats[i][9] = 'J';
            seats[i][10] = 'K';
        }
        Scanner console = new Scanner(System.in);
        int filled = 0;
        printSeats(seats);
        System.out.println("Enter seat (e.g. 1A) or zero to quit the program.");//How to make 0 the exit key?
        String input = console.nextLine();
        while ((filled <48) &&(input.length() >0)) {
            int row = input.charAt(0) - '1';
            int col = input.charAt(1) - 'A';
            if (row<0 || row>11 || col<0 || col>10) {
                System.out.println("Input error. Enter seat to assign (e.g., '1A'), " +
                        "or zero to quit.");
                input = console.nextLine();
            } else {
                if (seats[row][col] != 'X') {
                    seats[row][col] = 'X';
                    filled++;
                    System.out.println();
                    printSeats(seats);
                }

                if (filled < 48) {
                    System.out.println("Enter seat to assign (e.g., '1A'), " +
                            "or zero to quit:");
                    input = console.nextLine();
                }
            }
        }
        System.out.println("Final seat assignments: ");
        printSeats(seats);
    }

    private static void printSeats(char[][] seats) {

        for (int i = 0; i < seats.length; i++) {
            System.out.println((i + 1) + "   " +
                    seats[i][0] + seats[i][1] + seats[i][2] + seats[i][3] + seats[i][4] + "   " +
                    seats[i][5] + seats[i][6] + seats[i][7]+ seats[i][8] + seats[i][9]+ seats[i][10]);
        }
        System.out.println("There are XX number of seats available.");
    }
}