C11112331312111112111133132313331333133313233313331333132233133323211   >>    C1111233131211111211113313231333133313331323331333133313223313332321   <<    C11112331312111112111133132313331333133313233313331333132233133323213   >>      C11112331312111112111133132313331333133313233313331333132233133323212   >>