P - Punch
K - Kick
G - Free/Guard (will be written as "G" so as not to be confused with "forward". Commonly notated on other forums as F. Old-school DoA2 players will also know this as S.)
Dirctional inputs:
.- up (u)
|
up+back (ub) - 7 8 9 - up+forward (uf)
back (b) - 4 6 - forward (f)
down+back (db) - 1 2 3 - down+foward (df)
|
`- down (d)
Note: These numbers can be easily referenced by looking at your keyboard "numpad". Think of it as a joystick/controller that is facing to the right. "5" is used to signify "neutral".