1 files changed, 2 insertions, 0 deletions
diff --git a/index.js b/index.js
index 2ddad5b..980c6b4 100644
--- a/index.js
+++ b/index.js
@@ -11,6 +11,8 @@ const interpret = tree => {
     return D.explode(interpret(tree.left), interpret(tree.right))
   case 'K':
     return D.keepHigh(interpret(tree.left), interpret(tree.right))
+  case 'k':
+    return D.keepLow(interpret(tree.left), interpret(tree.right))
   case 'add':
     return D.add(interpret(tree.left), interpret(tree.right))
   case 'subtract':