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MultiplyByTwo←{⊑𝕩∊𝕨 ? 𝕨𝕊2×𝕩 ; 𝕩}
•Show 5‿3‿6‿1‿12 MultiplyByTwo 3
•Show 1‿2‿4‿3    MultiplyByTwo 1
•Show 5‿6‿7      MultiplyByTwo 2