diff -ur v32/ezmd.py v33/ezmd.py
--- v32/ezmd.py	2019-10-13 02:24:13.000000000 +0900
+++ v33/ezmd.py	2019-10-13 14:04:53.000000000 +0900
@@ -697,7 +697,16 @@
 		do_mode_ul(buf)
 		return outbuf.pop_tmp()
 
-	return flat_map( lambda tag: f(tag.v) if tag.name == 'index' else tag, outbuf.lst_get() )
+	def f_o(o):
+		if is_lst(o):
+			return flat_map(f_o, o)
+		if is_tag(o):
+			if o.name == 'index':
+				return f( o.v )
+			o.v = f_o( o.v )
+		return o
+
+	return f_o( outbuf.lst_get() )
 
 def ezmd(lst):
 	lst = ['p'] + lst