S = input()
N = len(S)
dp = [[0]*(N+1) for _ in range(3)]

for i in range(N):
    dp[0][i] = dp[0][i-1]
    if S[i]=="c":
        dp[0][i] += 1

for i in range(N):
    dp[1][i] = dp[1][i-1]
    if S[i]=="w":
        dp[1][i] += dp[0][i-1]

for i in range(N):
    dp[2][i] = dp[2][i-1]
    if S[i]=="w":
        dp[2][i] += dp[1][i-1]

print(dp[2][N-1])