Insert: 70
Tree:
70
Insert: 10
Tree:
70
   10
Insert: 60
Tree:
   70
60
   10
Insert: 20
Tree:
   70
60
      20
   10
Insert: 50
Tree:
   70
60
      50
   20
      10
Insert: 30
Tree:
      70
   60
50
      30
   20
      10
Insert: 40
Tree:
      70
   60
50
         40
      30
   20
      10
Insert: 25
Tree:
      70
   60
50
         40
      30
         25
   20
      10
Insert: 27
Tree:
      70
   60
50
         40
      30
         27
   25
      20
         10
Insert: 5
Tree:
      70
   60
50
         40
      30
         27
   25
         20
      10
         5