#coding:utf-8
S=raw_input()
N=len(S)
#i番目以降のwを数える
w=[0 for i in range(N)]
for i in range(N):
	w[N-1-i]=w[min(N-1,(N-i-1)+1)]
	if S[N-1-i]=='w':
		w[N-1-i]+=1

#i番目を起点にいくつのwwを作れるか
ww=[0 for i in range(N)]
for i in range(N-1):
	if S[i]=='w':
		ww[i]=w[i+1]

#i番目以降にいくつのwwを作れるか
ww2=[0 for i in range(N)]
for i in range(N):
	ww2[N-1-i]=ww2[min(N-1,(N-i-1)+1)]
	ww2[N-1-i]+=ww[N-1-i]

ans=0
for i in range(N):
	if S[i]=='c':
		ans+=ww2[i]
print ans