+------+-+-+ +------+-+-+ +-----+
| cons | | |--->| cons | | |--->| nil |
+------+-+-+ +------+-+-+ +-----+
| |
/------/ /------/
| |
v v
+----+---+ +----+---+
| nš | 1 | | nš | 2 |
+----+---+ +----+---+
cdr cdr
(1 2)----->(2)----->()
| |
car| car|
v v
1 2