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