输入不超过1000行，每行至多120个字符，每行的字符仅由大小写字母，空格，逗号或点（英文中的句号）
没有前置或后置空格，无空行且输入至少有一行。
BZPRO
样例输入1：
This is ACM North Eastern European Regional Contest,
sponsored by International Business Machines.
The. Best. Contest. Ever.
A Great Opportunity for all contestants.
样例输入2：
ab Ab A Abc AB Abcd ABc Abcde AbC
样例输入3：
Oh No Extra Spaces.And,Punctuation Ruin Everything
样例输出1：
This is ACM NEERC (North Eastern European Regional Contest),
sponsored by IBM (International Business Machines).
The. Best. Contest. Ever.
A GO (Great Opportunity) for all contestants.
样例输出2：
ab Ab A Abc AB Abcd ABc Abcde AbC
样例输出3：
Oh No ES (Extra Spaces).And,PRE (Punctuation Ruin Everything)