#user_line = input()
#comp_line = "one \ntwo \rThree"
#comp_line = comp_line + "авылор"
#comp_line.upper()
#print(comp_line.lower())
#words = user_line.split()
#stroka = "this my my my world"
#p3rint(stroka.index("my w"))
#print(stroka.replace("my", "your"))
#print("dfjd".isalnum())
#print(len(stroka))
#numbers = list(range(123 , 13 , -3))
#print(numbers)
#squares = [i ** 2 for i in range(10)]
#print(squares)