def main():
    s = input()

    lst = [-1]
    for i, ch in enumerate(s):
        if ch != "…":
            lst.append(i)
    lst.append(len(s))

    ans = 0
    for i in range(len(lst) - 1):
        ans = max(ans, lst[i + 1] - lst[i] - 1)
    print(ans)


if __name__ == "__main__":
    main()