24 паттерн с ифами

s = open('').readline()
d = 0
answ = 0
for i in range(len(s)):
    if (d != 0) and ((s[i - 1] == 'X' and s[i] == 'Y') or (s[i - 1] == 'Y' and s[i] == 'Z') or (s[i - 1] == 'Z' and s[i] == 'X')):
        d += 1
        answ = max(answ, d)
    elif s[i] == 'X':
        d = 1
    else:
        d = 0
print(answ)