S = input()
max = 0
count = 0
if "…"  in S:
    for i in range(len(S)-1):
        if S[i] == S[i+1] and S[i] == "…":
            count += 1
        else:
            count = 0
        if max <= count + 1:
            max = count + 1
    print(max)
else:
    print(0)