// Arup Guha
// 11/23/2024
// Example code dealing with strings, conversion from letters to 0-25 and back...

import java.util.*;

public class stringstuff {

	public static void main(String[] args) {
	
		String s = "thisisastring";
		
		// Will store frequency of each letter.
		int[] freq = new int[26];
		
		// Go through all letters update frequency.
		for (int i=0; i<s.length(); i++)
			freq[s.charAt(i)-'a']++;
		
		for (int i=0; i<freq.length; i++)
			System.out.println((char)(i+'a')+"\t"+freq[i]);
		
		
	}
}