@Test
public void distinct2() {

	CharSeq set = new CharSeq("");
	Assert.assertEquals(set.toString(), "");
	set = new CharSeq("1");
	Assert.assertEquals(set.toString(), "1");
	set = new CharSeq("11");
	Assert.assertEquals(set.toString(), "1");
	set = new CharSeq("1223345667899");
	Assert.assertEquals(set.toString(), "123456789");
	set = new CharSeq("0000000000000000000000000");
	Assert.assertEquals(set.toString(), "0");
	set = new CharSeq("0111111111111111111111111112");
	Assert.assertEquals(set.toString(), "012");
	set = new CharSeq("111111111111111112");
	Assert.assertEquals(set.toString(), "12");
	set = new CharSeq("1222222222222222222");
	Assert.assertEquals(set.toString(), "12");
	set = new CharSeq("000000987654321111111111");
	Assert.assertEquals(set.toString(), "0123456789");
}