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