def solution(S):
  count_r, count_l = 0,0
  count_total = 0
  count_total = S.count("RL")

  for i in S:
    if i == 'R':
      count_r += 1 
      continue
    elif(i == 'L'):
      count_l += 1
  if(count_r == count_r):
    count_total += 1

  return count_total