$ rm -f /tmp/out
$ perl5160 /tmp/p1
1: spawning...
1: sleeping...
2: spawning...
1: exiting
2: sleeping...
3: spawning...
3: sleeping...
2: exiting
3: exiting
$ grep -v '^\[..: my id is: ..]$' /tmp/out
[02[03: my id is: 03]
: my id is: 03]
$