Add backleft backright frontleft frontright

diff --git a/voicelist.csv b/voicelist.csv
index 2481844..9e26e5f 100644
--- a/voicelist.csv
+++ b/voicelist.csv
@@ -154,3 +154,7 @@ centerleft,中偏左,center left
 centerright,中偏右,center right

 181799,5秒后暗影之力,Shadow Force in 5
+backleft,左下左下左下,go back left
+backright右下右下右下,go back right
+frontleft左上左上左上,go front left
+frontright右上右上右上,go front right