Baddies are capital letters.

P = Spider
S = Sergeant
R = Cyberdemon
V = Invisible
I = Imp
D = Demon
B = Baron
H = Human
C = Cacodemon
K = Flying Skull

Useful things are small letters.

s = shotgun
c = chaingun
r = rocket launcher
p = plasma gun
w = chainsaw
b = bfg9000
a = ammo (all forms of ammunition)
h = health (stimpack, health pack, health bonus, supercharge)
g = green armor
m = mega armor
i = invincibility
o = other stuff
	- invisiblity
	- radiation suit
	- armor bonus
	- light goggles
	- berserk mode
	- computer area map