word='she sell sea shell on the sea shore'
print(word.count('s'))
print(word.count('she'))
print(word.count(' '))

password='abcABC123'
print(len(password))
print(password.isalpha())#是否僅包含英文字
print(password.isalnum())#是否包含英文或數字
print(password.isdigit())#是否僅包含數字

#Hello Pyth(str)
#0123456789