cccc cccl cccu cclc ccnc ccnr ccnu ccoc ccrc ccrl ccuc clon cloo clor clou clro clun cnco cnrc cnrr coco cocu col- coll coln colo colu con- conc conn cono cool coon cor- corc corl corn coro corr coul coun cour crcc crcr croc crol cron croo cror crun cucc cucn culc cull culo cuno cuon curl curn curo curr lccc lcor lcrl llcc lllc llll lloc lloo lncr locc locn loco locu loll lolo lono lonr looc lool loon loor lorn loro loul loun lour louu lroc lron lrrc lrrr lull lulu lunn luno nccc nccn nccr nccu nclc ncln nclr ncnc ncoc ncor ncrc nlcc nnnn nocl noco noll nolo non- nonn nono nonu noo- nool noon nooo noor nor- norc norn noro norr noul noun nour nroc nron nrrc nrrl nucu null nunc nunn nuno nuoc nuon nurc nurl nurn nurr nuru occc occn oclc ocon ocrl ocro ocrr ocul ocur olcc ollo olon olor olur onc- onco onno onon onor onur oocr oolo oooo orco orlo orlu ornc orno oro- oron oror orro oucc oulu oun- our- ourn ouro ouu- rccc rcnl rcnr rcon rnco rocc roco roll rolo ronc rono rool roon roor rorc roro roru roul roun rrrr rrun rull rulo runc runn runo rurc ruro ruru ruun ucon ucrc ulcc ulco ullo ullr ulno ulo- uloc ulul uncc uncl unco unno unon unro uocc uolc uor- uro- urol uroo urun urur uulu uuno uuoc uuuu