diff --git a/ch3/3_1_wordsteam.py b/ch3/3_1_wordsteam.py
index 9b10cbb..4850384 100644
--- a/ch3/3_1_wordsteam.py
+++ b/ch3/3_1_wordsteam.py
@@ -1,8 +1,8 @@
-# This script give you idea how stemming has been placed by using NLTK and Polyglot libraries.
+# This script give you idea how stemming has been placed by using NLTK library.
 # It is part of morphological analysis
+# Alternative NLTK-based implementation provided for morphological analysis
 
-from nltk.stem import PorterStemmer
-from polyglot.text import Text, Word
+from nltk.stem import PorterStemmer, LancasterStemmer, SnowballStemmer
 
 word = "unexpected"
 text = "disagreement"
@@ -21,37 +21,48 @@
 
 def stemmer_porter():
     port = PorterStemmer()
-    print "\nDerivational Morphemes"
-    print " ".join([port.stem(i) for i in text6.split()])
-    print " ".join([port.stem(i) for i in text7.split()])
-    print "\nInflectional  Morphemes"
-    print " ".join([port.stem(i) for i in text8.split()])
-    print " ".join([port.stem(i) for i in text9.split()])
-    print "\nSome examples"
-    print " ".join([port.stem(i) for i in word.split()])
-    print " ".join([port.stem(i) for i in text.split()])
-    print " ".join([port.stem(i) for i in text1.split()])
-    print " ".join([port.stem(i) for i in text2.split()])
-    print " ".join([port.stem(i) for i in text3.split()])
-    print " ".join([port.stem(i) for i in text4.split()])
-    print " ".join([port.stem(i) for i in text5.split()])
+    print("\nDerivational Morphemes")
+    print(" ".join([port.stem(i) for i in text6.split()]))
+    print(" ".join([port.stem(i) for i in text7.split()]))
+    print("\nInflectional  Morphemes")
+    print(" ".join([port.stem(i) for i in text8.split()]))
+    print(" ".join([port.stem(i) for i in text9.split()]))
+    print("\nSome examples")
+    print(" ".join([port.stem(i) for i in word.split()]))
+    print(" ".join([port.stem(i) for i in text.split()]))
+    print(" ".join([port.stem(i) for i in text1.split()]))
+    print(" ".join([port.stem(i) for i in text2.split()]))
+    print(" ".join([port.stem(i) for i in text3.split()]))
+    print(" ".join([port.stem(i) for i in text4.split()]))
+    print(" ".join([port.stem(i) for i in text5.split()]))
 
 
-def polyglot_stem():
-    print "\nDerivational Morphemes using polyglot library"
+def nltk_alternative_stem():
+    porter = PorterStemmer()
+    lancaster = LancasterStemmer()
+    snowball = SnowballStemmer('english')
+    
+    print("\nDerivational Morphemes using NLTK (alternative to polyglot)")
     for w in words_derv:
-        w = Word(w, language="en")
-        print("{:<20}{}".format(w, w.morphemes))
-    print "\nInflectional Morphemes using polyglot library"
+        print("{:<20}{}".format(w, porter.stem(w)))
+    
+    print("\nInflectional Morphemes using NLTK (alternative to polyglot)")
     for w in word_infle:
-        w = Word(w, language="en")
-        print("{:<20}{}".format(w, w.morphemes))
-    print "\nSome Morphemes examples using polyglot library"
-    for w in word_infle:
-        w = Word(w, language="en")
-        print("{:<20}{}".format(w, w.morphemes))
+        print("{:<20}{}".format(w, porter.stem(w)))
+    
+    print("\nComparison of NLTK stemmers (Porter, Lancaster, Snowball)")
+    test_words = words_derv + word_infle
+    print("{:<15} {:<15} {:<15} {:<15}".format("Word", "Porter", "Lancaster", "Snowball"))
+    print("-" * 60)
+    for word in test_words:
+        print("{:<15} {:<15} {:<15} {:<15}".format(
+            word,
+            porter.stem(word),
+            lancaster.stem(word),
+            snowball.stem(word)
+        ))
 
 
 if __name__ == "__main__":
     stemmer_porter()
-    polyglot_stem()
+    nltk_alternative_stem()