import java.util.*;
import java.io.*;

public class CharacterFrequency
{
	public static void main(String[] args)
	{
		File f = new File("letter1.txt");
		Scanner s;
		try
		{
			s = new Scanner(f);
		}
		catch (Exception e)
		{
			System.out.println("Big error!");
			return;
		}
		FrequencyBag<Character> fb = new FrequencyBag<Character>();
		while(s.hasNextLine())
		{
			String s1 = s.nextLine();
			for(char c : s1.toCharArray())
			{
				fb.add(new Character((char)(c<='Z'&&c>='A'?c+0x20:c)));
			}
		}
		System.out.println("Character: Frequency\n===================");
		for(int i=0x61;i<=0x7A;i++)
		{
			System.out.println((char)i+": "+fb.getFrequencyOf(new Character((char)i)));
		}
	}
}