S=raw_input()
dp=[[0]*len(S) for _ in xrange(4)]
if S[0]=="c": dp[1][0]=1
dp[0][0]=1
for i in xrange(1,len(S)):
  dp[0][i] = dp[0][i-1]
  if S[i]=="c":
    dp[1][i] = dp[0][i-1]+dp[1][i-1]
    dp[2][i] = dp[2][i-1]
    dp[3][i] = dp[3][i-1]
  elif S[i]=="w":
    dp[1][i] = dp[1][i-1]
    dp[2][i] = dp[1][i-1]+dp[2][i-1]
    dp[3][i] = dp[2][i-1]+dp[3][i-1]
  else:
    dp[1][i] = dp[1][i-1]
    dp[2][i] = dp[2][i-1]
    dp[3][i] = dp[3][i-1]
print dp[3][len(S)-1]