&
"ABC" & "123"
{ ; }
{ A2:A10 ; B4:B6 }
{ FILTER(A2:A10, A2:A10<>"") ; FILTER(B4:B6, B4:B6<>"") }
area
=IFERROR(UNIQUE(FILTER(area, area<>"")),"")
=UNIQUE_AREA({A1:A10;B1:B10})