What are the labials?
π, β, φ
What happens when a labial meets a σ?
It changes to a ψ
What are the velars?
κ, γ, χ
What happens when a velar meets a σ?
It changes to a ξ
what are the dentals?
τ, δ, θ
What happens when a dental meets a σ?
It drops off and leaves a σ,ς