C1111233131211111211113313331333133313232321333133313232233132312213231322321   >>    C111123313121111121111331333133313331323232133313331323223313231221323132232   <<    C1111233131211111211113313331333133313232321333133313232233132312213231322323   >>      C1111233131211111211113313331333133313232321333133313232233132312213231322322   >>