C11112331312111112111133133313331333132313233313331312111133133313232112312211   >>    C1111233131211111211113313331333133313231323331333131211113313331323211231221   <<    C11112331312111112111133133313331333132313233313331312111133133313232112312213   >>      C11112331312111112111133133313331333132313233313331312111133133313232112312212   >>