# get input text
    print("Input the text (. to exit): ")
    input_text = ""
    cur_input_text = ""
    while True:
        cur_input_text = input("> ")
        if cur_input_text == ".":
            if not input_text:
                print("ERROR: The text has to consist of more than 0 chars "
                      "and can not be a single dot.")
            else:
                break
        input_text += "\n" + cur_input_text