ex5.py

x = "There are %d types of people." %10
binary = "binary"
do_not = "don't"
y = "Those who knows %s and those who %s." %(binary, do_not)

print x
print y

print "I said: %r." % x
print "I Also said: '%s'." %y

hilarious = False
joke_evaluation = "isn't that joke so funny?! %r"

print joke_evaluation % hilarious

w = "This is the left side of .."
e = "a string with a right side."

print w + e