Update the inst chars
diff --git a/src/data.c b/src/data.c
index f6556e1..313341a 100644
--- a/src/data.c
+++ b/src/data.c
@@ -160,7 +160,7 @@
 
 #ifndef NDEBUG
 const char bc_inst_chars[] =
-	"edED_^*/%+-=;?~<>!|&`{}@[],NVMACaI.LlrOqpQsSJjPR$HovxzcZdfghkK";
+	"edED_^*/%+-=;?~<>!|&`{}@[],NVMACaI.LlrOqpQsSJjPR$bHovxzatfcZdghkKuU";
 #endif // NDEBUG
 
 #ifdef BC_ENABLED