S = list(raw_input())
N = len(S)
cnum = [1 if s == "c" else 0 for s in S]
wnum = [1 if s == "w" else 0 for s in S]
for i in xrange(N-1):
	cnum[i+1] += cnum[i]
	wnum[N-2-i] += wnum[N-1-i]
ans = 0
for i in xrange(1,N-1):
	if S[i] == "w":
		ans += cnum[i-1]*wnum[i+1]
print ans