S=list(input())
i=0
Co=[]
while i<len(S)-1:
 #   print (S)
    if S[i]=="c":
   #     print (i)
        while i<len(S):
    #        print (i)
            cc=0
            while i<len(S) and S[i]!="w":
                if S[i]=="c":
                    cc+=1
                i+=1
            Co.append(cc)
            cw=0
            while i<len(S) and S[i]!="c":
                if S[i]=="w":
                    cw+=1
                i+=1
            Co.append(cw)
        i+=1
    i+=1
#print (Co)
Sc=0
if len(Co)>1:
    St=len(Co)
    if len(Co)%2==1:
        St-=1
else:
    St=0
Nw=0
if St>2 and Co[St-1]==1 :
    Nw+=1
    St-=2
while St>1:
    Nw+=Co[St-1]
    Nw1=Nw-1
    Nw1*=Nw
    Nw1//=2
    Sc+=Nw1*Co[St-2]
    St-=2
print (Sc)