Connect By Root Example

I have a Table person_map which will have 2 columns,
Person_id,Mapped_person_id

For Example
Person_ID Mapped_Person_id
1 2
2 3
3 4
5 6
6 7

I require a query which will give output like below
1 2
1 3
1 4
2 3
2 4
3 4
5 6
5 7
6 7

Scripts
Create table Person (person_id Number, Mapped_person_id Number);

INSERT INTO PERSON VALUES ( 1,2);
INSERT INTO PERSON VALUES ( 2,3);
INSERT INTO PERSON VALUES ( 3,4);
INSERT INTO PERSON VALUES ( 5,6);
INSERT INTO PERSON VALUES ( 6,7);

Solution:

SELECT level, person_id AS original_person_id, 

CONNECT_BY_ROOT person_id AS root_person_id, mapped_person_id
      FROM person
 CONNECT BY person_id = prior mapped_person_id;