Osajono

# Osajonot
answer = 0
string = input()
size = 0
CharValues = [0]
DifferentCharacters = []

first = True
for i in string:
    size += 1
    if first:
        DifferentCharacters.append(i)
        CharValues[0] = 1
        first = False
    else:
        for x in range(len(DifferentCharacters)):
            if DifferentCharacters[x] == i:
                CharValues[x] += 1
                break
            if x == len(DifferentCharacters) - 1:
                DifferentCharacters.append(i)
                CharValues.append(1)
                

for i in CharValues:
    for x in range(i + 1):
        answer += x

print(answer)

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED