INDEX / Match formulas

Hi,

I have a list of data which I need to index and match into another tab. Unfortunately, I cannot manage the formula as I'm not used to the format of the data list which needs to remain intact.

In the data list, I have a table for each year (highlighted in red) and in each table, I have 8 clients (column A in blue) and a value attributed (column G yellow).
In the result tab, I need to match the data list value to the client in column A and year in row 1

I have tried the below to no avail.

=INDEX('DATA LIST'!A2:A35,MATCH(RESULT!A2,'DATA LIST'!A2:G36,0),MATCH(B1,'DATA LIST'!G3:G10:'DATA LIST'!G15:G22:'DATA LIST'!G27:G34,0))

I have attached a spreadsheet as an example. Any help is highly appreciated.