PYTHON. please use template!

ILANB ACTVTY 11.16.1: LAB: Reverse a String 1 class validity() def is-valid-parenthese(self, str1): Enter your code here.'" 4 6 7 8 9 1e returns 11 if name main ': s validity() xstr(input("")) print(s.is_valid_parenthese(x)) 14 15 16 11.16 LAB: Reverse a String Write a Python program to reverse a string word by word. Ex: If the input is Hello World! Then, the output is: World! Hello