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stbi/Lib/site-packages/Sastrawi/Morphology/Disambiguator/DisambiguatorPrefixRule20.py

+import re
+
+class DisambiguatorPrefixRule20(object):
+    """Disambiguate Prefix Rule 20
+    Rule 20 : pe{w|y}V -> pe-{w|y}V
+    """
+    
+    def disambiguate(self, word):
+        """Disambiguate Prefix Rule 20
+        Rule 20 : pe{w|y}V -> pe-{w|y}V
+        """
+        matches = re.match(r'^pe([wy])([aiueo])(.*)$', word)
+        if matches:
+            return matches.group(1) + matches.group(2) + matches.group(3)