Palindromi

# datatahti submission. Tehtävä palindroomi

# Luetaan syöte
s = input()

# Kirjoita ratkaisusi tähän
step = 0
syote_lst = [d for d in s]
for index, left in enumerate(syote_lst):
    right = len(syote_lst) - 1 - index
    if not len(syote_lst) - len(syote_lst) / 2 > index + 1:
        if not left == syote_lst[right]:
            step += 1
            syote_lst[index] = syote_lst[right]
    


# Tulostetaan vastaus
print (step)

Test 1 (public)

Verdict: ACCEPTED

Test 2 (public)

Verdict: ACCEPTED

Test 3 (public)

Verdict: ACCEPTED

Test 4 (public)

Verdict: ACCEPTED

Test 5 (public)

Verdict: ACCEPTED

Test 6 (public)

Verdict: ACCEPTED

Test 7 (public)

Verdict: ACCEPTED

Test 8 (public)

Verdict: ACCEPTED

Test 9 (public)

Verdict: ACCEPTED

Test 10 (public)

Verdict: ACCEPTED