C11112331312111112111133133313331333132313133313113313231232323211   >>    C1111233131211111211113313331333133313231313331311331323123232321   <<    C11112331312111112111133133313331333132313133313113313231232323213   >>      C11112331312111112111133133313331333132313133313113313231232323212   >>