NATO uses a set of codenames for designating enemy aircraft. The first letter of the codename describes the type of aircraft
A : Air-to-air missile
F : Fighters
B : Bombers
H : Helicopters
G : SAM

Examples:
Archer : ...
Atoll : ...

Fishbed: Mig-21
Flanker: Su-27

Bear: Tu-160

Havoc: Mil-28
Hokum: Ka-52

Grison: SA-19