diff --git a/main.go b/main.go
index 6e2bbbf..2570db7 100644
--- a/main.go
+++ b/main.go
@@ -66,6 +66,15 @@ func main() {
 	})
 
 	filesByGroup := channel.FlatMap(groupedFiles, func(key string, _ struct{}) string { return key })
+
+	filesByGroup = channel.MapSuccessive(filesByGroup, func(s string) string {
+		fmt.Println("GROUPED", s)
+		fmt.Println("EXISTS", Exists(s))
+		fmt.Println("SymlinkFilesOnly", SymlinkFilesOnly(s))
+		fmt.Println("VideosOnly", VideosOnly(s))
+		return s
+	})
+
 	filteredFiles := channel.Filter(filesByGroup, Or(Not(Exists), And(SymlinkFilesOnly, VideosOnly)))
 
 	filteredFiles = channel.MapSuccessive(filteredFiles, func(s string) string {