Automation anywhere has $Excel Cell Row$ variable. It shows your focussed cell's cell number
You can use excel cell row variable with go to specific cell option
For example
variable operation mycell = excel cell number
if excel cell number =< 63
go to cell b$mycell$
variable operation $mycell$ = $mycell$+1
else
go to cell a$mycell$
variable operation $mycell$ = $mycell$+1
endif