make d17p2 sub-ms

day17/d17p2.swift

@@ -89,7 +89,7 @@ func possibleAs(fromB5 b5Suffix: Int) -> [Register] {
         let a = Register(value: (b4^b5Suffix) << aShift, mask: 0b111 << aShift)
         return a.combine(with: Register(value: aSuffix, mask: 0b111))
     }
-    return choices.sorted()
+    return choices
 }
 
 func findA(from a: Register, _ outputs: [Int]) -> [Register] {