In Capital letters^x, Past perfect^x

Believer wrote: Once you enter the premises, you will see desks with a piece of paper that has a capital letter written on it. You are to find the letter that corresponds to the first letter of your last name and check-in. After you have signed your name and the person at the desk have confirmed...

Thank you, Hoa Thai. I have two more questions, if you are willing to lend a helping hand. 1. I wrote this in the original inquiring post: Once you enter the premises, you will see desks with a piece of paper that has a capital letter written on it. You are to find the letter that corresponds...