A.range(10,0,-1)B.range(10,1,-1)C.range(9,0,-1)D.range(9,1,-1)
A.range(0,11,2)B.range(0,10,2)C.range(1,11,2)D.range(1,10,2)
A.sum(range(1,101))B.sum(range(0,101))C.sum(range(1,100))D.sum(range(0,100))