s = input()
n = len(s)
ans = 0
w = s.count('w')
if w <= 1:
	print(ans)
	exit()

for i in range(n):
	if s[i] == 'c':
		tmp = s[i:]
		w = tmp.count('w')
		if w >= 2:
			ans += w*(w-1) // 2
print(ans)