using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("By Brandon Eduardo Cortes Correa");

        Console.WriteLine("");

                    Console.WriteLine(test("frizz"));

            Console.WriteLine(test("zane"));

            Console.WriteLine(test("Zazz"));

            Console.WriteLine(test("false"));

            Console.ReadLine();

        }

​

   public static bool test(string str)

        {

            int ctr = 0;

​

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

            {

                if (str[i] == 'z')

                {

                    ctr++;

                }

            }

​

            return ctr > 1 && ctr < 4;

        }

    }