s = str(input())
n = len(s)
C = [0]*(n+1)
W = [0]*(n+1)
for i, c in enumerate(s):
    if c == 'c':
        C[i] += 1
    if c == 'w':
        W[i] += 1

for i in range(1, n+1):
    C[i] += C[i-1]

for i in reversed(range(n-1)):
    W[i] += W[i+1]

ans = 0
for i, c in enumerate(s):
    if c == 'w':
        ans += C[i]*W[i+1]
print(ans)