$1 = 0
$2 = 0


$0 = A[$0+1,$1+1] - B[$0+1,$1+1]
while($0 == 0)
  $2 = $2 + 1
  $1 = $1 + (($2+1)/W)
  $2 = $2 % W
    
  $10 = A[$0+1,$1+1]
  $20 = B[$0+1,$1+1]
  $0 = $10 - $20
end  


return($1+1,$2+1)