{"trustable":false,"sections":[{"title":"题目描述","value":{"format":"MD","content":"一年一度紧张刺激的四级考试来了,但我们的rnm学姐因为紧张而没有抢到四级的名额,所以她被气得不分字母的大小写了。\n这意味着,她看“Apple”、“apple”或“APPLE”等词都是一样的。\n但是她决定每天看一篇英语作文开始备战明年的四级考试!\n看完一篇英语作文后,她会按照字典序从小到大对该篇的出现的英语单词进行整理"}},{"title":"输入格式","value":{"format":"MD","content":"测试数据将输入一篇英语作文。不超过$5000$行,每一行最多$200$个字符,并以$\\text{EOF}$结束。"}},{"title":"输出格式","value":{"format":"MD","content":"按照字典序输出她学到的单词,每行输出一个单词,**输出单词时所有的字母全部小写**。\n数据保证最多有$5000$个需要输出的单词。"}},{"title":"样例输入1","value":{"format":"MD","content":"```plaintext\nAdventures in Disneyland\n\nTwo blondes were going to Disneyland when they came to a fork in the\nroad. The sign read: \"Disneyland Left.\"\n\nSo they went home.\n```"}},{"title":"样例输出1","value":{"format":"MD","content":"```plaintext\na\nadventures\nblondes\ncame\ndisneyland\nfork\ngoing\nhome\nin\nleft\nread\nroad\nsign\nso\nthe\nthey\nto\ntwo\nwent\nwere\nwhen\n```"}},{"title":"样例输入2","value":{"format":"MD","content":"```plaintext\na a a a a a a a, a a a a a a.\na a a a b a a a. a? a!!!\n```"}},{"title":"样例输出2","value":{"format":"MD","content":"```plaintext\na\nb\n```"}},{"title":"样例输入3","value":{"format":"MD","content":"```plaintext\n\nI will pass the CET-4!!!!one times.\n```"}},{"title":"样例输出3","value":{"format":"MD","content":"```plaintext\ncet\ni\none\npass\nthe\ntimes\nwill\n```"}},{"title":"提示","value":{"format":"MD","content":"单词与单词之间可能存在标点符号,但标点符号显然不能算作单词的一部分。"}},{"title":"","value":{"format":"MD","content":""}}]}