If you wish to strum:
C - G - Am - Em
[ Tab from: http://www.guitaretab.com/w/wintersleep/160926.html ]
Or if you wish to pick:
C G Am Em
e|---------------------------------------------0----------------------|
B|---------------1--0--------------0--------------1------------0------|
G|------------0--------0--------0-----------2--------2------0---------|
D|---------2-----------------------------2----------------------------|
A|------3-----------------------------0-------------------------------|
C|-------------------------3-3--------------------------0-0-----------|
C G Am Em
e|---------------------------------------------0----------------------|
B|---------------1--0--------------0--------------1-------------------|
G|------------0--------0--------0-----------2--------2----------0-----|
D|---------2-----------------------------2-------------------2--------|
A|------3-----------------------------0-------------------------------|
C|-------------------------3-3--------------------------0-0-----------|