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a = [1, 2, 3] assert a[0] == 1 assert a[1..2] == [2, 3] s = "abcd" assert s[0] == "a" assert s[1..2] == "bc" b = bytes("abcd", "utf-8") assert b[0] == 97 assert b[1..2] == bytes("bc", "utf-8")