local q 0
forv i=1/20 {
	forv j=1/20 {
		display "check `i',`j'"
		if el("a",`i',`j')==20 {
			display "found at `i',`j'"
			local q 1
			continue, break
		}
	}
	
	if `q' continue, break
}
if !`q' {
	display "not found"
}