using System;
public class Program
{
public static void Main()
int g=0;
string c="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
string a,x;
for(int i=0;i<26;i++)
Console.Write("write the letter "+c[i]+" in lower");
a=Console.ReadLine();
if(a.Length==1)
x=a.ToUpper();
if(x[0]==c[i])
g++;
}
Console.WriteLine("Youre grade is:"+g+"/26");