String Slices
	• Sequences can be sliced >>> “abcdef”[1:3] “bc” >>> “abcdef”[:3]          # [:n] == [0:n] “abc” >>> “abcdef”[3:]          # [n:] == [n:len(seq)] “def” >>> “abcdef”[:]           # copy “abcdef” • Note, include low, exclude high means: • len(seq[n:m]) = m-n • seq[:n]+seq[n:] == seq[:]