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