英语翻译Murder in closet happened again in a small restaurant an

英语翻译
Murder in closet happened again in a small restaurant and Conan went there to collect evidence with Kogoro.After they reached the restaurant,they got a list of renters that lived in this restaurant recently.Yet the list was so long that they couldn't get the useful information from it.As an assistant of Conan,you must have been ready to help him to get the information on which rooms the renters have lived in.
输入
There are no more than 20 test cases.The first line of each test case contains two integers n and m,indicating the number of renters and the rooms of the restaurant (0 < n,m