diff --git a/unit04_public_key/lab/README.md b/unit04_public_key/lab/README.md
index 373df94..8b276c6 100644
--- a/unit04_public_key/lab/README.md
+++ b/unit04_public_key/lab/README.md
@@ -314,39 +314,28 @@ test="Test123"
 alice = pyelliptic.ECC() 
 bob = pyelliptic.ECC()
 
-print "++++Keys++++"
-print "Bob's private key: "+bob.get_privkey().encode('hex')
-print "Bob's public key: "+bob.get_pubkey().encode('hex')
+print ("++++Keys++++")
+print ("Bob's private key: ",bob.get_privkey().hex())
+print ("Bob's public key: ",bob.get_pubkey().hex())
 
-print
-print "Alice's private key: "+alice.get_privkey().encode('hex')
-print "Alice's public key: "+alice.get_pubkey().encode('hex')
+print()
+print ("Alice's private key: ",alice.get_privkey().hex())
+print ("Alice's public key: ",alice.get_pubkey().hex())
 
 
 ciphertext = alice.encrypt(test, bob.get_pubkey())
 
-print "\n++++Encryption++++"
+print ("\n++++Encryption++++")
 
-print "Cipher: "+ciphertext.encode('hex')
+print ("Cipher: "+ciphertext.hex())
 
-print "Decrypt: "+bob.decrypt(ciphertext)
-
-signature = bob.sign("Alice")
-
-print 
-print "Bob verified: "+ str(pyelliptic.ECC(pubkey=bob.get_pubkey()).verify
-(signature, "Alice"))
+print ("Decrypt: "+bob.decrypt(ciphertext))
 ```
 
 For a message of “Hello. Alice”, what is the ciphertext sent (just include the first four characters):
 
 
 
-How is the signature used in this example?
-
-
-
-
 ### D.2 	
 Let’s say we create an elliptic curve with y<sup>2</sup> = x<sup>3</sup> + 7, and with a prime number of 89, generate the first five (x,y) points for the finite field elliptic curve. You can use the Python code at the following to generate them: