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2013-06-12T20:58:22+02:00

254-11= 244-1=264-22=304-40  etc

 

86-35=56-5= 76-25=66-15  etc

 

127-15= 117-5=147-35=113-1 = 177-65  etc

 

ex 75-24 = 55-4 = 100-49= 70-19  = 150-48 etc