using System;

public class Program

{

    static int contTinArray(string[] arr)

    {

        int countT = 0;

        for (int i=0;i<arr.Length;i++)

        {

            for (int j=0; j<(arr[i]).Length;j++)

            {

                if((arr[i])[j] == 't')

                {

                    countT = countT + 1;

                }

            }

        }

        return countT;

    }

    static int contTin2DArray(char[,] arr)

    {

        int countT = 0;

        for (int i=0;i<arr.GetLength(0);i++)

        {

            for (int j=0; j<arr.GetLength(1);j++)

            {

                if(arr[i,j] == 't')

                {

                    countT = countT + 1;

                }

            }

        }

        return countT;

    }

    public static void Main()

    {/*

        int numT = 0;

        string[] strrarray = { "abdt", "abdt", "abdt"};

        numT = contTinArray(strrarray);

        Console.WriteLine(numT);

        */

        int numTin2DArr = 0;

        char[,] testArr = new char[,]{

            {'s', 'f', 't', 's', 'f', 't', 'g'},

            {'s', 'f', 't', 's', 'f', 't', 'g'},

            {'s', 'f', 't', 's', 'f', 't', 'g'},

            {'s', 'f', 't', 's', 'f', 't', 'g'},

            {'s', 'f', 't', 's', 'f', 't', 'g'}

        };

        numTin2DArr=contTin2DArray(testArr);

        Console.WriteLine(numTin2DArr);

        //char[,] test = new char[5,9]; 

        //Console.WriteLine(test.GetLength(0));// returns num of rows

        //Console.WriteLine(test.GetLength(1));// returns num of cols

​

    }

}