c-cd cccc cccf cccl cccu ccdc ccdf ccdn ccfc ccfd ccff ccfl cclc ccnc ccnf ccnu ccoc ccod ccuc cddl cdnc cdnf cdon cfcf cfcl cfcn cfco cfln cfun clcd cldc clod clof clon cloo clou clud clun cnco cndd coco cocu codd codl cofc coff col- cold coll coln colo colu con- conc cond conf conn cono cood coof cool coon coud coul coun cucc cucn cufc cuff cufo culc culd cull culo cund cuno cuon dccc dccl dccu dcfc dcon dddd ddlc ddoc dfcc dfco dfcu dlco dnoc doco docu dod- dodd dodo doff dold dolf doll dolo dolu donc dond donn dono dood doof dool doon douc doud douf doul doun duco dudd dudo dudu dufc duff dufu dulc dull dulo dulu dunc dunn duno duo- duon duul fccf fcnl fdoc ffcc ffff ffun flcl flnc floc flod flon floo flou flud fluf fluo fndd fndn fnlc fnuf foco fofo folc fold foll folo fond fono food foof fool foon foud foul foun fuc- fudd fufc fuff fufu full fulu fund funf lccc lcdd lcfc ldcf lfcc llcc lldc lllc llll lloc llod lloo llud lndn locc locn loco locu loff lofn lold loll lolo lond lono looc lood loof lool loon loud loul loun louu ludd ludo luff lufu lull lulu lund lunn luno nccc nccf nccn nccu ncdc ncdn ncdu ncfc nclc ncln ncnc ncnd ncoc ndcc nddo ndoc nfcu nfdc nfff nfld nfon nlcc nlcf nnnn nocl noco nodo nodu nold nolf noll nolo non- nonn nono nonu noo- nool noon nooo noul noun nucu nudc nudd nudo nuff null nunc nunn nuno nuoc nuon occc occn oclc ocon ocul oddd odon odoo odou ofcl off- offc offo offu ofno olcc oldn ollo olof olon onc- oncd oncf onco ondo onlf onno onod onon ooff oold oolo oooo oucc oudc oufc ouff ould oulu oun- ound ouu- ucdc ucdd ucon udon udoo udun ufcu ulcc ulco ullo ulno ulo- uloc ulul uncc uncf uncl unco undo unfd unlf unno unon uocc uofl uofo uolc uulu uuno uuoc uuuu