(source [0, 0] - [1, 0]
  (sqr_arr_lit [0, 0] - [0, 14]
    (num_lit [0, 2] - [0, 3])
    (num_lit [0, 4] - [0, 5])
    (num_lit [0, 6] - [0, 7])
    (num_lit [0, 8] - [0, 9])
    (num_lit [0, 10] - [0, 11])
    (num_lit [0, 12] - [0, 13])))
