6 2 1 5 7 3 8 4

6 2 1 3 5 7 4 8

6 2 1 3 4 8 5 7

6 2 1 3 8 4 5 7

9

10

11

12

r1, r2, m2, m1

r1, r2, m1, m2

r1, r2, r1, r2, m1, m2

r1, m1, r2, m2

3

1

NaN

ReferenceError: Cannot access 'a' before initialization

1 0 0

1 0 undefined

1 undefined undefined

0 0 0

1, undefined

1, 1

undefined, undefined

error

a c d

a c e

a c

undefined

First Second

Third

Third Third

Third Fourth

[ test, test2]

[ test, test]

[ undefined, undefined ]

Error

1 6 3 7 5 8 2 4

1 6 3 7 4 5 8 2

1 6 3 5 7 8 2 4

1 4 6 3 7 5 8 2