tabbed by chase

----------------------------
----------------------------
-2222------0-00050505050----
-----3-333------------------

           -or-

----------------------------
----------------------------
----------------------------
-7777-3-333-5-55575757575---

           then

-----------------------
-----------------------
-2222----5555----------
-----3333-----5555-----

          -or-

-------------------------
-------------------------
------------5555---------
-7777-3333-------5555----