δ-0, α-3, α-6, β-3, α-4, β-4, β-5, β-2, α-8, γ-9, α-5, γ-5, δ-2, β-7, δ-1, γ-0, β-6, γ-4, α-0, β-0, α-7, α-9, γ-8, α-1, β-9, γ-2, β-1, γ-6, γ-7, γ-3, α-2, γ-1. Is "α-4" in the previous list? 
Provide no explanation, directly answer with only "Yes." or "No."