"""
Program 1 (80 points):

A website has the following rules for creating a valid user name:

    The first and last characters must be different
    No digits are allowed
    The allowed length is between 5 and 10 characters

Write a function valid_user_name that takes one string parameter. 
The function should return True, if the parameter is a valid user name and False otherwise.

Write a program that first reads the number of users, then generates a 
list of strings from user input (use this function 
Links to an external site.). 
The program uses the function valid_user_name and 
creates two new lists: list of valid user names and list of invalid user names. 
The program prints both lists and finds the number of valid and invalid user names.
"""

def valid_user_name(str):
	size=len(str)
	if(size < 5 or size > 10):
		return False
	cond1=(str[0]!=str[-1])
	if(cond1==False):
		return False

	count_digit=0
	for item in str:
		if(item.isdigit()):
			count_digit+=1

	if(count_digit>0):
		return False
	else:
		return True
def make_list_string(size):
	#this function creates a list of strings from user input

	my_list=[]
	for i in range(size):
		new_str = input("enter string ")
		my_list.append(new_str)

	return my_list
def main():
	size=int(input("enter size "))
	list=make_list_string(size)
	valid=[]
	non_valid=[]
	for item in list:
		if(valid_user_name(item)):
			valid.append(item)
		else:
			non_valid.append(item)
	print(valid)
	print(non_valid)
main()