def main():
    S = input()
    max_length = 0
    length = 0
    for char in list(S):
        if char == "…":
            length += 1
        else:
            if length > max_length:
                max_length = length
            length = 0
    if length > max_length:
        max_length = length
    print(max_length)

if __name__ == '__main__':
    main()