S=input().strip()

#jまでに作れるc,cw,cwwの数
dp=[[0 for i in range(3)] for j in range(len(S)+1)]
dp[0][0]=0
dp[0][1]=0
dp[0][2]=0
for i in range(len(S)):
    if S[i]=='c':
        dp[i+1][0]=dp[i][0]+1
        dp[i+1][1]=dp[i][1]
        dp[i+1][2]=dp[i][2]
    elif S[i]=='w':
        dp[i+1][0]=dp[i][0]
        dp[i+1][1]=dp[i][1]+dp[i][0]
        dp[i+1][2]=dp[i][2]+dp[i][1]
    else:
        dp[i+1][0]=dp[i][0]
        dp[i+1][1]=dp[i][1]
        dp[i+1][2]=dp[i][2]

# print(dp)
print(dp[len(S)][2])