Osajono

import java.util.Scanner;
public class Test {
    public static void main(String[] args) {
        System.out.println("String: ");
        Scanner inp = new Scanner(System.in);
        String test = inp.nextLine();
        int[] num;
        num = new int[26];
        test = test.toUpperCase();
        char[] testa = test.toCharArray();
        for(char t : testa){
            int cnum = (int) t;
            int ccnum = cnum - 65;
            num[ccnum] = num[ccnum] + 1;            
        }
        int ans = 0;
        for(int n : num){
            ans = ans + ((n * (n + 1))/2);
        }
        System.out.println(ans);
        
        
        }
    }

Test 1

Group: 1

Verdict: WRONG ANSWER

Test 2

Group: 1

Verdict: WRONG ANSWER

Test 3

Group: 1

Verdict: WRONG ANSWER

Test 4

Group: 1

Verdict: WRONG ANSWER

Test 5

Group: 1

Verdict: WRONG ANSWER

Test 6

Group: 2

Verdict: WRONG ANSWER

Test 7

Group: 2

Verdict: WRONG ANSWER

Test 8

Group: 2

Verdict: WRONG ANSWER

Test 9

Group: 2

Verdict: WRONG ANSWER

Test 10

Group: 2

Verdict: WRONG ANSWER

Test 11

Group: 3

Verdict: WRONG ANSWER

Test 12

Group: 3

Verdict: WRONG ANSWER

Test 13

Group: 3

Verdict: WRONG ANSWER

Test 14

Group: 3

Verdict: WRONG ANSWER

Test 15

Group: 3

Verdict: WRONG ANSWER