S = input()

start = end = 0
flg = 0
for i in range(len(S)):
    if flg == 0 and S[i] == "c":
        start = i
        flg += 1
    elif flg == 1 and S[i] == "w":
        flg += 1
    elif flg == 2 and S[i] == "w":
        end = i
        break

if end - start:
    print(end-start+1)