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    %person = ( name=>'buffy',job=>'vampire slayer'   );

...

    # result: 'buffy is a vampire slayer'

    sub describe {
...
    # result: ' is a '

($_='kkvvttuubbooppuuiiffssqqffssmmiibbddllffss')
 =~y~b-v~a-z~s;                             print