#Методы строк
s = 'Hello, world'
# print(len(s))
# s2 = s.capitalize()
# print(s, s2)
# print(s.center(20))
# print(s.count('l' ))
# print(s.find('e'))
# print(s.replace('l', 't'))
# print(s.split())
# print(s.isdigit())
# print(s.isalpha())