A "sandwich" letter is one that is surrounded by two similar letters. Given a string string, return the number of sandwich letters in the string. Example IO: sandwich Letters ('abacd ')...

python3 program

Extracted text: A "sandwich" letter is one that is surrounded by two similar letters. Given a string string, return the number of sandwich letters in the string. Example IO: sandwich Letters ('abacd ') sandwichLetters ('abcdcdc ') #returns 3 #returns 1