first BST
root1 = None NEW_LINE root1 = insert ( root1 , 8 ) NEW_LINE root1 = insert ( root1 , 10 ) NEW_LINE root1 = insert ( root1 , 3 ) NEW_LINE root1 = insert ( root1 , 6 ) NEW_LINE root1 = insert ( root1 , 1 ) NEW_LINE root1 = insert ( root1 , 5 ) NEW_LINE root1 = insert ( root1 , 7 ) NEW_LINE root1 = insert ( root1 , 14 ) NEW_LINE root1 = insert ( root1 , 13 ) NEW_LINE