题解 | #参数解析#

def op(s):
    option = ''
    while s:
        if s[0] != '"':
            if s[0] != ' ':
                option += s[0]
                s = s[1:]
            else:
                if option:
                    res.append(option)
                s = s[1:]
                return op(s)
        else:
            s = s[1:]
            while s[0] != '"':
                option += s[0]
                s = s[1:]
            else:
                res.append(option)
                s = s[1:]
                return op(s)
    else:
        if option:
            res.append(option)
        return res


while True:
    try:
        s1 = input()
        s2 = op(s1)
        print(len(s2))
        for i in s2:
            print(i)
    except:
        break