C11112331312111112111133133313331333132313233313331312111133133313232121321   >>    C1111233131211111211113313331333133313231323331333131211113313331323212132   <<    C11112331312111112111133133313331333132313233313331312111133133313232121323   >>      C11112331312111112111133133313331333132313233313331312111133133313232121322   >>