import re

S = input().strip()

txt = 'cww'
cnt = 0
pos1 = 0
pos2 = 0

for i in range(len(S)):
  if S[i] == 'c':
    if cnt < 2:
      pos1 = i
      #print('pos1:{}'.format(pos1))
    
    if cnt == 0:
      cnt += 1
  
  if S[i] == 'w' and cnt > 0:
    pos2 = i
    #print('pos2:{}'.format(pos2))
    cnt += 1
    
  if cnt > 2:
    break
else:
  pos1 = 0
  pos2 = -2

print(str(pos2 - pos1 + 1))