C11112331333132311331333131333133313231333132212111133132331123121   >>    C1111233133313231133133313133313331323133313221211113313233112312   <<    C11112331333132311331333131333133313231333132212111133132331123123   >>      C11112331333132311331333131333133313231333132212111133132331123122   >>