S = input()
c_idx = S.find("c")
w_1_idx = S.find("w", c_idx)
w_2_idx = S.find("w", w_1_idx+1)
if not c_idx == -1 or w_1_idx == -1 or w_2_idx == -1:
    print(w_2_idx-c_idx+1)