Binary Search Tree busybox

A-justValues [
  4,
  2,
  6,
  1,
  3,
  5,
  7
]

B-byRow [
  [
    4
  ],
  [
    2,
    6
  ],
  [
    1,
    3,
    5,
    7
  ]
]

C-leafLabel [
  (4 root),
      (2 L),
        1 L leaf,
        3 R leaf
      (6 R),
        5 L leaf,
        7 R leaf
]