Palindromi

word = input()
list_word=list(word)
counter=0
for x, y in enumerate(list_word):
    if y==list_word[(len(list_word)-1)-x]:
        continue
    else:
        counter+=1
        list_word[(len(list_word)-1)-x]=y

if len(list_word)%2==0:
    testi=list_word
    list_word[len(list_word)//2]=list_word[(len(list_word)//2)-1]
    if testi!=list_word:
        counter+=1

print(counter)

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