Index: parse.py
==================================================================
--- parse.py
+++ parse.py
@@ -13,11 +13,11 @@
 )
 
 t_ignore = " |"
 
 #t_BASENOTE = r"[A-Ga-g]"
-t_BASENOTE = r"I?V?I*[^ ]"
+t_BASENOTE = r"I+V?|VI*|i+v?|vi*"
 t_ACCIDENTAL = r"\^{1,2}|_{1,2}|="
 t_REST = r"z"
 t_OCTAVE = r"'+|,+"
 t_CHORD_TYPE = r"m|7|m7|0|o|\+|mb5|sus|sus4|maj7|mmaj7|7sus4|dim|dim7|7b5|m7b5|6|b6|m6|mb6|46|maj9|9|add9|7b9|m9"