s = 'AAAAAAAACCAACCgujhfgjhAAFF'
f = [1] * len(s)
for i in range(1, len(s)):
    if s[i-1:i+1] == "AA" or s[i-1:i+1] == "CC":
        f[i] = f[i-1] + 1
    else:
        f[i] = 1
print(max(f))