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#8060. 出勤

الإحصائيات

在课堂上点名是一项繁琐的任务。你需要按字母顺序逐个点出学生的名字。如果学生在场,他们会在你点下一个名字之前回答“Present!”。

这项任务非常枯燥,以至于你有时会走神,无法妥善记录出勤情况。请编写一个程序来帮助你总结缺勤情况!

输入格式

输入的第一行包含一个整数 $N$ ($1 \le N \le 200$),表示“点名”的次数。接下来的 $N$ 行按点名顺序给出了点名记录。每一行要么是一个学生的名字,要么是回答 Present!。学生的名字由 2 到 10 个字符组成,第一个字符始终为大写字母('A'-'Z'),其余字符始终为小写字母('a'-'z')。

输入中的学生名字按字母顺序排列,且只有当上一行是学生名字时,才会出现 Present! 的回答。特别地,Present! 永远不会作为第一次点名出现。

输出格式

按点名的顺序输出所有缺勤学生的名字,每行一个。如果没有学生缺勤,只需输出 No Absences

样例

输入 1

6
Buckley
Burnadette
Present!
Chad
Present!
Erin

输出 1

Buckley
Erin

输入 2

3
Alice
Bob
Charlie

输出 2

Alice
Bob
Charlie

输入 3

8
Gregory
Present!
Maureen
Present!
Milton
Present!
Xavier
Present!

输出 3

No Absences

输入 4

5
Gift
Present!
Present
Treat
Present!

输出 4

Present

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