# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	S = input()
	N = len(S)
	left_c = [0] * N
	right_w = [0] * N
	ans = 0
	for i in range(N):
		if S[i] == "c":
			left_c[i] = 1
		elif S[i] == "w":
			right_w[i] = 1

	for i in range(1, N):
		left_c[i] += left_c[i - 1]

	for i in range(N - 2, -1, -1):
		right_w[i] += right_w[i + 1]

	for i in range(1, N - 1):
		if S[i] == "w":
			ans += left_c[i - 1] * right_w[i + 1]

	print(ans)

if __name__ == '__main__':
	main()