Guess the missing item from this list: β-5, δ-0, β-0, γ-9, γ-6, γ-3, β-6, γ-4, α-4, β-4, α-0, β-9, β-8, β-3, α-6, α-7, γ-0, γ-7, α-3, γ-5, α-5, α-8, γ-1, β-2, δ-2, α-2, β-1, γ-2, δ-1, γ-8, α-9, β-7.
Directly answer with only one item. Item format should match the list format. Provide no explanation. Answer format: "{item}."