S = input()
c = []
w1 = []
w2 = []

for k in range(len(S)):
    if S[k] == "c":
        c.append(k)

for l in c:
    for m in range(l+1,len(S)):
        if S[m] == "w":
            w1.append(m)

for l in w1:
    for m in range(l+1,len(S)):
        if S[m] == "w":
            w2.append(m)

c = set(c)
w1 = set(w1)
w2 = set(w2)

ans = []
for p in c:
    for q in w1:
        for r in w2:
            if p < q < r:
                if [p,q,r] not in ans:
                    ans.append([p,q,r])

print(len(ans))