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  1. or download this
    > perl -E '
    use P;
    ...
    _=2
    _=1
    _=0
    
  2. or download this
    > perl -E '
    use P;
    P "_=%s", $_ for $_=3;$_-- >0; '
    _=3
    
  3. or download this
    > perl -E '
    use P;
    ...
    '
    _=11
    got to end w/_=11