Index: src/0dev.org/commands/short/main.go
==================================================================
--- src/0dev.org/commands/short/main.go
+++ src/0dev.org/commands/short/main.go
@@ -19,24 +19,33 @@
 
 	rec := recommend(pairs, symbols)
 	fmt.Println(*rec)
 }
 
-type pair struct {
-	value uint16
-	count uint64
-}
-
-type symbol struct {
-	value byte
-	count uint64
-}
-
 type recommendation struct {
 	p2s map[uint16]byte
 	s2p map[byte]uint16
 }
+
+func apply(rec *recommendation, reader io.Reader) {
+	symbolReader := iou.SizedReader(iou.ReaderFunc(func(output []byte) (int, error) {
+		for i := 0; i < len(output)-1; i++ {
+			// Read a byte from the underlying reader
+			count, err := reader.Read(output[i : i+1])
+			if err != nil || count != 1 {
+				return i + count, err
+			}
+
+			// Convert the byte to a pair if there is a mapping for it
+			if pair, ok := rec.s2p[output[i]]; ok {
+				output[i] = byte(pair >> 8) // extract the high byte from the pair
+				i++
+				output[i] = byte(pair) // leave only the low byte from the pair
+			}
+		}
+	}), 2)
+}
 
 func recommend(pairs pairSlice, symbols symbolSlice) *recommendation {
 	var (
 		rec         recommendation
 		pairsLength = len(pairs)
@@ -131,10 +140,20 @@
 	}
 	sort.Sort(allSymbols)
 
 	return availablePairs, allSymbols
 }
+
+type pair struct {
+	value uint16
+	count uint64
+}
+
+type symbol struct {
+	value byte
+	count uint64
+}
 
 // Implements fmt.Stringer, used for debugging
 func (p pair) String() string {
 	return fmt.Sprintf("[ %d %d (%d) ]", (p.value >> 8), ((p.value << 8) >> 8), p.count)
 }