diff --git a/gencodes/main.go b/gencodes/main.go
new file mode 100644
index 0000000..eb1aa38
--- /dev/null
+++ b/gencodes/main.go
@@ -0,0 +1,79 @@
+package main
+
+import (
+	"log"
+	"strings"
+)
+
+func main() {
+	// Generate all possible values up to 10 bits
+	byLen := map[int][]string{
+		1: []string{"0", "1"},
+	}
+
+	for l := 2; l <= 10; l++ {
+		values := []string{}
+
+		for _, v := range byLen[l-1] {
+			values = append(values, v+"0", v+"1")
+		}
+
+		byLen[l] = values
+	}
+
+	limits := map[int]int{
+		1:  0,
+		2:  0,
+		3:  0,
+		4:  2,
+		5:  8,
+		6:  8,
+		7:  16,
+		8:  32,
+		9:  64,
+		10: 256,
+	}
+
+	total := 0
+	short := 0
+
+	for l := 1; l <= 10; l++ {
+		vs := byLen[l]
+		limit := limits[l]
+		values := []string{}
+
+	valueLoop:
+		for _, v := range vs {
+			if limit == 0 {
+				break
+			}
+
+			for i := 1; i < l; i++ {
+				for _, v2 := range byLen[i] {
+					if strings.HasPrefix(v, v2) {
+						continue valueLoop
+					}
+				}
+			}
+
+			values = append(values, v)
+			limit--
+			print(v + "\n")
+		}
+
+		byLen[l] = values
+
+		total += len(values)
+		if l < 8 {
+			short += len(values)
+		}
+	}
+
+	for l := 1; l <= 10; l++ {
+		values := byLen[l]
+		log.Printf("%d: %d", l, len(values))
+	}
+
+	log.Printf("total=%d", total)
+	log.Printf("short=%d", short)
+}