First constructed linked list is : 12 . 35 . 1 . 10 . 34 . 1
first = push ( first , 1 ) NEW_LINE first = push ( first , 34 ) NEW_LINE first = push ( first , 10 ) NEW_LINE first = push ( first , 1 ) NEW_LINE first = push ( first , 35 ) NEW_LINE first = push ( first , 12 ) NEW_LINE second = None NEW_LINE