using System;

public class Test
{
	public static void Main()
	{
string[,] table3x3 = new string[3, 3];  
string myString = "11A23A4A5A87A5";
string[] splitA = myString.Split(new char[] { 'A' });

int index = 0;
bool first = true;
foreach (string part in splitA)
{
    int row = index / 3;
    int col = index % 3;

    if (!first)
    {
        table3x3[row, col] = part[0].ToString();
    }

    index += part.Length;
    first = false;
}

	for (int row = 0; row < 3; row ++)
	{
		for (int col = 0; col < 3; col++)
			if (string.IsNullOrEmpty(table3x3[row,col]))
				Console.Write("[ ]");
			else
				Console.Write("["+table3x3[row,col]+"]");
		Console.WriteLine();
	}
	}
}