Timetable

Hello,

I currently have a table within excel which looks like:
\1

The class groups are in column A and the Day/Period run along the top. What I would like to have is:

\1

Where you enter the initials at the top and press a button, and then the timetable square updates to fill (from the data given in the first table) the class groups in the appropriate space.

I would really appreciate some guidance on how to do this. Many Thanks.

Sorry about that. I have included the excel document.

The data is in the sheet "School TT Y-GROUPS" and what i would like to achieve is in "TT_RESULT"

Thanks