C11112331312111112111133132313331333133313233313331323221323112121   >>    C1111233131211111211113313231333133313331323331333132322132311212   <<    C11112331312111112111133132313331333133313233313331323221323112123   >>      C11112331312111112111133132313331333133313233313331323221323112122   >>