C (Stealth)

Sub-Skills
C1 (Blending)

C2 (Assassination)

C3 (Fitness)

C4 (Pickpocket)

C5 (Sneak)

C6 (Speech)

C7 (Driving)

With E (Crafting)
CE2 (Cartography)

…and AE1 (Alchemy) & BE2 (Chemistry)
CE1 (Poison Creation)