题解 | #参数解析#

import sys

line=sys.stdin.readline()[:-1]

stack=[]
cmds=[]
cmd=[]
for c in line:
    if c=='"':
        if len(stack)!=0:
            stack.pop(0)
        else:
            stack.append('"')
    elif c==' ' and len(stack)==0:
        cmd_string=''.join(cmd)
        cmds.append(cmd_string)
        cmd=[]
    else:
        cmd.append(c)

cmd_string=''.join(cmd)
cmds.append(cmd_string)

print(len(cmds))
for cmd in cmds:
    print(cmd)
# print(cmds)