Combine 2 iferror argument into one formula

Hi All,

I need your help to advice how to combine two iferror formula into one because I have formula from 2 table which I want to find the missing in either table which shows result in one cell.

=IFERROR(IF(AND(MATCH(Sheet2!E3,Sheet3!D3:O3,0),MATCH(Sheet2!G3,Sheet3!D3:O3,0)),"A","B"),"C")
=IFERROR(IF(AND(MATCH(Sheet3!E3,Sheet2!D3:O3,0),MATCH(Sheet3!G3,Sheet2!D3:O3,0)),"A","B"),"F")

Thanks and appreciate your help and advice.

Regards,
Kenji