C11112331333132311331333133112111133132313232233312111113331323131333121   >>    C1111233133313231133133313311211113313231323223331211111333132313133312   <<    C11112331333132311331333133112111133132313232233312111113331323131333123   >>      C11112331333132311331333133112111133132313232233312111113331323131333122   >>