diff --git a/17-project-empty-file-finder/exercises/2-sort-to-a-file-2/main.go b/17-project-empty-file-finder/exercises/2-sort-to-a-file-2/main.go
index be84c3ee1..8d5727af7 100644
--- a/17-project-empty-file-finder/exercises/2-sort-to-a-file-2/main.go
+++ b/17-project-empty-file-finder/exercises/2-sort-to-a-file-2/main.go
@@ -13,6 +13,7 @@ import (
 	"io/ioutil"
 	"os"
 	"sort"
+	"strconv"
 )
 
 // ---------------------------------------------------------
@@ -65,7 +66,9 @@ func main() {
 	sort.Strings(items)
 
 	var data []byte
-	for _, s := range items {
+	for i, s := range items {
+		data=strconv.AppendInt(data,int64(i+1),10)
+		data=append(data,","," ")
 		data = append(data, s...)
 		data = append(data, '\n')
 	}