def two_lengt_run(list):
    i = 0
    p = []
    g = 0
    a = False
    length = len(list)
    while i in range(0,length):



      if int(list[i]) == int(list[i+1]):
            a = True
            g = g + 1
      elif int(list[i]) != int(list[i+1]):
            a = False

      if a == False:
        p.append(g + 1)
        g = 0

      if i != length:
        break

    i = i + 1

    print(max(p))

list = input('Enter a list of characters separated ').strip().split(" ")
two_lengt_run(list)