(1) L1 = (apple, pear, banana, orange);
(2) L2 = ((apple, pear), (banana, orange));
(3) L3 = (((apple), (pear), (banana), (orange)));
(4) L4 = (apple, (pear), ((banana)), (((orange))));
(5) L5 = ((((apple))), ((pear)), (banana), orange);
(6) L6 = ((((apple), pear), banana), orange);
(7) L7 = (apple, (pear, (banana), orange));
(2) GetHead【GetHead【GetTail【L2】】】
(3) GetHead【GetHead【GetTail【GetTail【GetHead【L3】】】】】
(4) GetHead【GetHead【GetHead【GetTail【GetTail【L4】】】】】
(5) GetHead【GetHead【GetTail【GetTail【L5】】】】
(6) GetHead【GetTail【GetHead【L6】】】
(7) GetHead【GetHead【GetTail【GetHead【GetTail【L7】】】】】