C11112331312111112111133133313331311331323212331333132313231221   >>    C1111233131211111211113313331333131133132321233133313231323122   <<    C11112331312111112111133133313331311331323212331333132313231223   >>      C11112331312111112111133133313331311331323212331333132313231222   >>