public class Freqs {
    int counts [] = new int[26];
    
    public void countLet(String s) {
        for (int i=0; i < counts.length; i++) counts[i]=0;
        
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            int index = (int) (c - 'a'); 
            counts[index]++;
        }
        System.out.println(toString());
    }
    
    public boolean equals(Freqs f) {
        for (int i=0; i < counts.length;i++) {
            if (counts[i] != f.counts[i]) return false;
        }
        return true;
    }
    
    public String toString() {
        String s = "";
        for (int i=0; i < counts.length; i++) {
           char c = (char) (i + 'a'); 
           if (counts[i]>0) s = s + c + "  " +counts[i] + "\n";
        }
        return s;
    }
}