How strings are processed in Python with couple of examples, inclduing:

• Caesar ciphers: implement Caesar encryption algorithm
• Alternative String: given a string, remove some characters to receive an alternative string
• Reduce String: given a string, remove two consecutive letters that are the same
• Sub-String: check if a given string is subsequence of another string ot not
• Pangram: check if a string contains all letters in alphabet
• Separate Numbers: given a string, split it into a sequence of increasing numbers
• ...