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lowercase‿centre‿fact‿choose⇐ Lowercase ← (32×1="A["⊸⍋)⊸+ Centre ← { (-0⌈⌊2÷˜𝕨-≠𝕩)⌽𝕨↑𝕩 } Fact ← ×´1+↕ Choose ← Fact∘⊣÷⊢×○Fact-