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