%hash = (
          '70' => 'show real effect forc chang speed bodi set move previous thought',
          '75' => 'happen bodi forc act given newton second law',
          '73' => 'galileo measur us newton basi law motion',
          '65' => 'idea first state explicitli newton principia mathematica publish 1687 known newton first law'
        );

@LoL = (
         '73',
         'galileo measur us newton basi law motion',
         '75',
         'galileo experi bodi roll slope act same forc weight effect make constantli speed up',
         '70',
         'show real effect forc chang speed bodi set move previous thought',
         '75',
         'meant bodi act forc keep move straight line same speed',
         '65',
         'idea first state explicitli newton principia mathematica publish 1687 known newton first law',
         '75',
         'happen bodi forc act given newton second law'
       );