import re

S = input().strip()

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

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

print(str(pos2 - pos1 + 1))