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