# extend earlier range
my $skip = int(($row{endpoint} || $row{startpoint}) / $row{cols});
for ($skip + 1 .. (hex($+{start}) / $row{cols}) - 1) {
# extend earlier range
my $skip = int(($row{endpoint} || $row{startpoint}) / $row{cols});
for ($skip + 1 .. (hex($+{start}) / $row{cols}) - 1) {