##
1,1,,,123,Main,St,City,State,Zip
##
##
1,1,1,P-550,11223344
2,1,2,P-330,22334455
##
##
$excel{$tab}{$row}{$col} = $cell->{Val};
$rehash{$tab}{$id}{$row} = $excel{$tab}{$row}{$col};
##
##
for my $s2_key (keys %{$rehash{"1"}}) {
if ( exists( $rehash{"1"}{$s2_key} )) {
print SOMETHING;
}