#March 2, 2018
#Exam 2 Problem 2
#The program is partially written for you.

#Problem 2: (15 points)

#Not all plastic containers are recyclable. 

#We will assume that each plastic container has
#a serial number - a string that consists of 5 chars: 
#digits and letters only, (upper and lowercase are allowed). 

#The rule for recycling is simple: if the last char in the serial number is a letter and there is at least ONE digit in the serial number, 
#the container is recyclable, otherwise, its not.

#Write a fucntion recycle_str that has one parameter - string of chars that represents a serial number of the plastic  container.
#The function returns True if container is recyclable and False otherwise.

#Write a fucntion recycle_list that has one parameter - list of strings, each string represents a serial number of 
#the plastic  container. 
#The function creates and returns two new lists: first list contains all serial numbers of recyclable containers, and
#second list contains all serial numbers of non-recyclable containers. Use function recycle_str to determine which string 
#is from recyclable container and which one is not.


#Complete the main to print two new lists: list of serial numbers of recycble containersand list of all serial numbers of non-ecycble 
#containers
 
#Pay attention, the function that generates list of strings is written for you. The function takes in account
#that the strings must contain letters and digits only and that each string has length 5. 
#YOU CAN USE THE FACT THAT EACH STRING CONTAINS LETTERS AND DIGITS ONLY. YOU DON'T NEED TO WORRY ABOUT ANY OTHER CHARS IN THE STRINGS

import random

def randomString(size):
	#this function generates the string
	#using random numbers and conversion 
	#to character
	#function returns randomly generated string

	my_string=""
	i=0
	while(i<size):
		num=random.randint(33, 126)
		letter=chr(num)
		if(letter.isalnum()):
			my_string=my_string+letter
			i+=1
	
	return my_string

def make_list_string_random(size):
	my_list=[]
	
	for i in range(size):
		new_str = randomString(5)
		my_list.append(new_str)

	return my_list

def main():
	size=random.randint(10,15)
	my_list=make_list_string_random(size)
	print(my_list)
	#COMPLETE MAIN HERE

main()