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