def main():
  s = input()
  rle = [(s[0], 0)]
  for c in s:
    if rle[-1][0] == c:
      rle[-1] = (c, rle[-1][1] + 1)
    else:
      rle.append((c, 1))
  ans = 0
  for (c, n) in rle:
    if c == "…":
      ans = max(ans, n)
  print(ans)


if __name__ == "__main__":
  main()