import re
import random

file = open("input.txt","r")
text = file.readlines()
file.close() 

first = []
second = []
third = []
fourth = []

sentence =re.compile(r"(An?\s|The\s)?(\w+\s)(\w+\s)(an?\s|the\s)?(\w+\s)(.*\.)")	

for line in text:
   result = sentence.search (line)
   if result.group(1):
       first.append(result.group(1)+result.group(2))
   else:
       first.append(result.group(2))
   second.append(result.group(3))
   if result.group(4):
       third.append(result.group(4)+result.group(5))
   else:
       third.append(result.group(5))
   fourth.append(result.group(6))

answer = raw_input("Would you like to see a random sentence? ")
while answer != "no":
   print
   print first[random.randrange(0,3,1)]+second[random.randrange(0,3,1)] + \
   third[random.randrange(0,3,1)] +fourth[random.randrange(0,3,1)]
   print

   answer = raw_input("Would you like to see a random sentence? ")