diff --git a/demo.py b/demo.py
index 02058a2..4afbfbe 100644
--- a/demo.py
+++ b/demo.py
@@ -4,6 +4,8 @@
 #print(converter.toUnicode("ba b+ba [a] ba\\u0f0b"))
 
 orig = "ba b+ba [a] ba\\u0f0b"
+orig = "snga 'phros a ri gzhung dang rgya gar gzhung so sor gsang ba'i thog nas nang don mthun lam chen po zhig nges par tu thugs zab  thog/"
+
 print(orig)
 warns = []
 res = converter.toUnicode(orig, warns)
@@ -18,3 +20,8 @@
 
 print(converter.toWylie("In Chinese"))
 
+#warns = []
+#print(converter.toUnicode("snga 'phros a ri gzhung dang rgya gar gzhung so sor gsang ba'i thog nas nang don mthun lam chen po zhig nges par tu thugs zab  thog", warns))
+
+
+#print(converter.toUnicode("snga ", warns))
\ No newline at end of file
diff --git a/pyewts/pyewts.py b/pyewts/pyewts.py
index 3871909..9f9e1d6 100644
--- a/pyewts/pyewts.py
+++ b/pyewts/pyewts.py
@@ -960,7 +960,7 @@ def toUnicodeOneStack(self, tokens, i):
             t2 = tokens[i+1]
         if t2 != None and self.isSuperscript(t) and self.superscript(t, t2):
             if self.check_strict:
-                next = consonantString(tokens, i + 1)
+                next = self.consonantString(tokens, i + 1)
                 if not self.superscript(t, next):
                     next = next.replace("+", "")
                     warns.append("Superscript \"" + t + "\" does not occur above combination \"" + next + "\".")
@@ -1111,11 +1111,11 @@ def toUnicodeOneTsekbar(self, tokens, i):
             if not self.check:
                 continue 
             if state == self.State.PREFIX and stack.single_consonant != None:
-                consonants.add(stack.single_consonant)
+                consonants.append(stack.single_consonant)
                 if self.isPrefix(stack.single_consonant):
                     next = t
                     if self.check_strict:
-                        next = consonantString(tokens, i)
+                        next = self.consonantString(tokens, i)
                     if next != None and not self.prefix(stack.single_consonant, next):
                         next = next.replace("+", "")
                         warns.append("Prefix \"" + stack.single_consonant + "\" does not occur before \"" + next + "\".")