note
swkronenfeld
This is pulling out all the digits. The OP is just asking for the "digits between the spaces".
<code>
my $x = "a1aa11 b2bb22bbb222 c3cc33";
my @nums = $x =~ /\d+/g;
print join(" ", @nums) . "\n";
Output:
1 11 2 22 222 3 33
</code>
[561313|Ikegami's answer] is pulling out the numbers between the spaces.
561309
561315