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

for i in range(N):
    if S[i] == 'c':
        dp[i + 1][0], dp[i + 1][1], dp[i + 1][2] = dp[i][0] + 1, dp[i][1], dp[i][2]
    elif S[i] == "w":
        dp[i + 1][0], dp[i + 1][1], dp[i + 1][2] = dp[i][0], dp[i][1] + dp[i][0], dp[i][2] + dp[i][1]
    else:
        dp[i + 1][0], dp[i + 1][1], dp[i + 1][2] = dp[i][0], dp[i][1], dp[i][2]

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