Ositus

from itertools import chain, combinations

maara = 0
sallittu = True

def permute(s):
    result = [[s]]
    for i in range(1, len(s)):
        first = [s[:i]]
        rest = s[i:]
        for p in permute(rest):
            result.append(first + p)
    return result

s = input()
for i in permute(s):
	sallittu = True
	for q in range (len(i)):
		if len("".join(set((i[q])))) != len(i[q]):
			sallittu = False
	if (sallittu):
		maara += 1
print(maara)

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 6

Group: 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 16, in <module>
    for i...

Test 7

Group: 3

Verdict: RUNTIME ERROR