Where is the Longest String

I have a small block of cells, say C4 through G11. The cells contain text of various lengths. I can easily get the length of the longest string in the block with the array formula:

=MAX(LEN(C4:G11))

I need a formula to get the address of the cell with this longest string. If there is more than one cell with the longest string, I need the address of the cell closest to the top the the block. If the is more than one cell with the longest string in the same row, I need the address of the one closest to the left edge of the block.

In the above example the formula should retu E8.

For this workbook, I can't use VBA. Any suggestions ??