How many more Chevrolet Aveo than Chevrolet Cruze were sold in 2012?
return Chevrolet Aveo ;return Chevrolet Cruze ;return #1 that were sold ;return #2 that were sold ;return #3 in  2012 ;return #4 in  2012 ;return number of  #5 ;return number of  #6 ;return difference of #7 and  #8
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