def check():
    user_numsq = user_num ** 2
    user_string = str(user_numsq)
    print (user_string) #RMV
    user_list = list(user_string)
    first_number = 0
    second_number = 1

    for x in user_list:
        user_list[first_number:second_number]
        print(user_list)
        if  1 == 0:
            print ("Your number is a Kaprekar Number!")
        else:
            first_number = first_number + 1
            second_number = second_number + 1
            print (first_number)
            print (second_number)

def valid(): #check if user input is valid
    if isinstance(user_num, int) == True: #if the type is int
        check()
        print("checked RMV")
    else: #anything else
        print("Error. Unable to convert your number into an int")


cont = "y"
while cont == "Yes" or cont == "Y" or cont == "yes" or cont == "y":
    user_input = input("Please enter your number: ")
    user_num = int(user_input)
    valid()

    cont = input("Would you like to continue? If you do not, the window will close!: ")