verse
-3-3-3---3-3-3-3-3-----------------|
-----------------------------------|
-------5-----------4---------------|
-----------------------------------|
[ Tab from: https://www.guitartabs.cc/tabs/a/alice_in_chains/again_btab_ver_3.html ]
chorus
-3-3---3-----3-4-4-4-4-4-4-4-4-----|
-----3---5-3-----------------------|
-----------------------------------|
-----------------------------------|
Fill in
-3---3------3---3-6-5-4-3---3-------|
---5----------5-----------5---------|
------------------------------------|
------------------------------13-14-|
that's pretty much it, i think you can figure out how many times they're played and
i kept losing count... it's pretty easy. :)