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  1. or download this
    $g=10;
$|=1;
...
}

print @data;
  2. or download this
    I will wait for 2 seconds
Good morning. I slept about 2 seconds
...
Good morning. I slept about 10 seconds
I will wait for 11 seconds
Good morning. I slept about 11 seconds
  3. or download this
    I will wait for 2 seconds
I will wait for 3 seconds
...
Good morning. I slept about 9 seconds
Good morning. I slept about 10 seconds
Good morning. I slept about 11 seconds
  4. or download this
    #!/usr/local/bin/perl
use warnings;
...
}

print @out;