C1111233131211111211113313331333133313232212111133132213331323133313231322321   >>    C111123313121111121111331333133313331323221211113313221333132313331323132232   <<    C1111233131211111211113313331333133313232212111133132213331323133313231322323   >>      C1111233131211111211113313331333133313232212111133132213331323133313231322322   >>