auto import from //depot/cupcake/@135843
diff --git a/contrib/pngminus/pngminus.sh b/contrib/pngminus/pngminus.sh
new file mode 100644
index 0000000..2a0a9d8
--- /dev/null
+++ b/contrib/pngminus/pngminus.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+make -f makefile.std
+sh png2pnm.sh
+sh pnm2png.sh
+