Palindromi

s = input()
lista = []
for c in s:
    lista.append(c)


revLista = list(reversed(lista))

i = 1
count = 0
for char in lista:
    if char == lista[len(lista)-i]:
        i +=1
    else:
        lista[len(lista)-i] = char
        revLista = list(reversed(lista))
        i += 1
        count += 1
    if lista == revLista:
        print(count)
        
        break
    
    
    

    
    
    

    

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