# coding: utf-8
S = str(input())

ans = 0
if S[1] == "…":
    temp = 1
else:
    temp = 0

for k in range(1,len(S)):
    if S[k] == "…" and S[k-1] != "…":
        temp = 1
    elif S[k] == S[k-1] == "…":
        temp += 1
    else:
        temp = 0
    ans = max(ans,temp)

print(ans)