"""第 03 课补全练习：筛选四句五七言。修改 solve，保持下方检查不变。"""
import math, io, argparse
import torch
from torch import nn
from torch.nn import functional as F
torch.set_num_threads(2)
torch.manual_seed(26)

def solve(lines):
    raise NotImplementedError("请补全：筛选四句五七言；参考答案见 solution.py")

assert solve(['春江花月夜']*4)
assert not solve(['春江']*4)
assert not solve(['春江花月夜']*3)
print("本课补全练习通过。")