C1111233131211111211113313331333133313332213113121111331313331323132323221   >>    C111123313121111121111331333133313331333221311312111133131333132313232322   <<    C1111233131211111211113313331333133313332213113121111331313331323132323223   >>      C1111233131211111211113313331333133313332213113121111331313331323132323222   >>