C11112331312111112111133132313331333133313232212111113331311223133313211   >>    C1111233131211111211113313231333133313331323221211111333131122313331321   <<    C11112331312111112111133132313331333133313232212111113331311223133313213   >>      C11112331312111112111133132313331333133313232212111113331311223133313212   >>