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