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            This program computes                      

   { A[ ].B[ ] } - { C[ ].D[ ] } = { E[ ].F[ ] }       

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 { A[ ].B[ ] } =   1111111110.10100

 { C[ ].D[ ] } =   0000100101.11011

 { E[ ].F[ ] } = 1 1111011000.11001

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