I need to retrieve the numbers from a text file which looks +/- like this:
[ Index 1 ]
1628 5704
32801 61605
71508 90612
1026061
I need to ignore Indexe's number.
[0-9]+ retrieve all numbers, index as well.
I tried something like this called the negative lookahead (?![(Index 1)])([0-9]+). It ignores 1 indeed, but all of them... for instance 1628 becomes 628. Appreciate for help, I've always been weak in the regex syntax.