ID  FIRST_NUMBER   SECOND_NUMBER
1	1	           1
2	1	           2
3	2	           3
4	2	           4
5	3	           5
6	3	           6
7	4	           7
8	4	           6
9	5	           8
10	5	           9
11	6	          10
12	6	           9

##</code><code>##

if($_=~/^(\d+)\t(.*)/)
{	
	$id=$1;
	$rest=$2;

	@split_rest = split(/\t/, $rest);
	$first_num=$split_rest[0];
	$second_num=$split_rest[1];

	$HoH{$id}{$first_num} = $second_num;