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C# 369 Characters
static void Main(string[] a){var b = new[] {123,72,61,109,78,103,119,73,127,111};var g = new[]{" _ ","|","_","| ","|","_","| "};a[0].ToCharArray().SelectMany((x,w)=>g.Select((y,i)=>new{s=((b[x-48]>>i&1)==1)?y:new String(' ',y.Length),j=i,v=w})).GroupBy(z=>(z...