Nutshell is probably Alice In Chains best known song, and was released in 1994 on their album Jar Of Flies. It is a very basic progression and very similar to many other songs that came out of the 1990s grunge genre. It does have an unusual rhythmic structure which can be a bit tricky to count.
The original and most live performances are tunes down a half step but this lesson is done at standard pitch and includes a metronome segment to play along with. There is also a short segment looking at the melodic lead lines that happen between verses.