S = input()

cpos = [i for i, x in enumerate(S) if x == "c"]

wpos = [i for i, x in enumerate(S) if x == "w"]

ans = -1

for i in cpos:
    wpostemp = [j for j in wpos if j > i]

    if ans < wpostemp[1] - i + 1:
        ans = wpostemp[1] - i + 1

print(ans)