using System;

public class Test
{
	public static void Main()
	{
		string[,] table3x3 = new string[3, 3];  
string myString = "11A23A4A5A87A5";

int stringIndex = -1;
bool immediatelyFollowsA = false;
for (int row = 0; row < 3; row++)
	for (int col = 0; col < 3; col++)
	{
		while (myString[++stringIndex] == 'A')
		{
			immediatelyFollowsA = true;
		}
		if (immediatelyFollowsA)
		{
			table3x3[row,col] = myString[stringIndex].ToString();
			immediatelyFollowsA = 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();
	}
	}
}