题解 | #参数解析#

s = input()
#1 如果s中不存在引号，则直接用空格分
ls = []
if '"' not in s:
    ss = s.split()
    for i in ss:
        ls.append(i)
#2 如果s中有引号，则先用引号分再用空格分
else:
    ss = s.split('"')
    for i in range(len(ss)):
        if i%2 == 1:
            ls.append(ss[i])
        else:
            sss = ss[i].split()
            for j in sss:
                ls.append(j)
print(len(ls))
for i in ls:
    print(i)