/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String s = "better butter";
 
		int freq[] = new int[26];
 
		int i;
		for (i = 0; i < s.length(); i++) {
			if (s.charAt(i) >= 'a' && s.charAt(i) <= 'z')
				freq[s.charAt(i)-'a']++;
		}
 
		for (i = 0; i < freq.length; i++) {
			if (freq[i] == 0) continue;
			System.out.println((char)(i+'a') + " appears " + freq[i] + " times" );
		}
	}
}

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