Return Range Address Across Different Columns Based On Conditions

I am trying to return a cell address range based on values in different columns. Attached is an example.

In Column A1 I have "Range" and below that a set of numbers from 1 to 31.

In Column B1 the name "Test" is used as an identifier, below that are the letters "a" though to "e". Once the letter "e" is reached the identifier "Test" is moved to column C "C6" and the alphabet continues from "f" down to "j". This process is repeated through the rest of the alphabet and the identifier moved to the next column after every 5th letter.

What I want to do is as follows:-

I would like to know the cell addresses of all instances of "test" from Column A numbers 6 throught to 24. The result should be C7:C12, D14:18 & D20:24. The results should ignore all instances of the identifier "test" and only return the cells which contain the letters of the alphabet.

I have tried using Vlookup which works well if the letters are all in the same column and I have incorporated the Address and Match formulas to return the range if all the alphabets are in the same column, but I do not know how to do this if the identifier "test" and letters move to a differnt column.