using System;
public class Program
{
public static void Main(string[] args)
{
string str = "csharp programming language";
int count = 0;
int strsize = str.Length;
for (char ch = 'a'; ch <= 'z'; ch++) {
for (int i = 0; i < strsize; i++) {
if (ch == str[i]) {
Console.Write(ch + " ");
count++;
break;
}
}
}
Console.WriteLine("\nTotal number of different characters are: " + count);
}
}
/*
run:
a c e g h i l m n o p r s u
Total number of different characters are: 14
*/