def cnt_delete(s):
    original_s = s
    left_cnt = 0
    while True:
        if 'ccw' in s:
            s = s[1:]
            left_cnt += 1
        else:
            break

    right_cnt = 0
    s = original_s
    while True:
        if 'ccw' in s:
            s = s[:-1]
            right_cnt += 1
        else:
            break
    if left_cnt < right_cnt:
        print(left_cnt)
    else:
        print(right_cnt)


s = input()
cnt_delete(s)