A = 
[[1,3,5,7,9]
 [2,4,6,8,10]
 [3,5,7,9,11]
 [4,6,8,10,12]
 [5,7,9,11,13]]

[[1,2,3,4,5]
 [3,4,5,6,7]
 [5,6,7,8,9]
 [7,8,9,10,11]
 [9,10,11,12,13]]

[[4,6]
 [5,7]]

[[4,5]
 [6,7]]