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