Seven Wonders Solution:

import java.util.*;
import java.util.stream.Collectors;

public class Kattis {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Map<Character, Integer> map = sc.nextLine().chars().boxed().collect(
                Collectors.toMap(k -> ((char) k.intValue()), v -> 1, Integer::sum));
        int total = 0;
        int sets = Integer.MAX_VALUE;
        int types = 0;
        for (Map.Entry<Character, Integer> k : map.entrySet()) {
            types++;
            if(k.getValue() < sets)
                sets = k.getValue();
            total += Math.pow(k.getValue(), 2);
        }
        System.out.printf("%d", (types > 2)? total + 7 * sets:total);
    }
}