题解 | #参数解析#

def xx(a):
    kk = list(a)[::-1] #逆序pop()
    ls = []
    flag = 0
    s = ""
    while kk:
        i = kk.pop()
        if i != '"':
            s += i
        else:
            if flag:   #flag=1的时候不需要split()
                if s:
                    ls.append(s)
                    s = ""
                flag = 0
            else:
                if s:
                    for i in s.split():
                        if i:
                            ls.append(i)
                    s = ""
                flag = 1
    if s:         #最后别忘了还有字符串没加进来
        for i in s.split():
            if i:
                ls.append(i)

    return ls


while True:
    try:
        a = input().strip()
        ls = xx(a)
        print(len(ls))
        for i in ls:
            print(i)
    except:
        break