C1111121111331311211331333133313331313331323311211113313231333133313231221   >>    C111112111133131121133133313331333131333132331121111331323133313331323122   <<    C1111121111331311211331333133313331313331323311211113313231333133313231223   >>      C1111121111331311211331333133313331313331323311211113313231333133313231222   >>