-er c-- ccc cce cch cck cco ccr ccu ccz ce- cec cee ceh cek ceo cer ceu cez ch- chc che chh chk cho chr chu chz ckc ckh cko co- coc coe coh cok coo cor cou coz crc cre crh crk cro crr cru crz cuc cue cuh cuk cuo cur cuu cuz cz- czc cze czk czo ec- ecc ece ech eck eco ecr ecu eec eee eek eeo eer ehc ehe ehh eho ehr ehu ekc eke ekh eko ekr eku eo- eoc eoe eoh eok eoo eor eou erc ere erh erk ero err eru erz eu- euc eue eur eze ezh ezo ezr ezz hcc hce hch hck hco hcr he- hec hee heh hek heo her heu hez hhc hhe hhh hhk hho hhr hhu hhz hkh hkk hko hkr hku hoc hoe hoh hok hoo hor hou hr- hrc hre hrh hrk hro hrr hru hrz huc hue huh huk huo hur huu huz hze hzo k-z kcc kce kch kck kcr kcu ke- kec kee keh kek keo ker kez khe khh khk kho khr khu khz kkc kke kkh kkk kkr kku koc koe koh kok koo kor kou koz krc krk kro krr kru kuc kue kuh kuk kur kuu kzo oc- occ och ock oco ocr ocu ocz oec oee oeh oeo oer ohc ohe ohh oho ohr ohu okc oke okk oko okr oku oo- ooc ooh ook ooo oor or- orc ore orh ork oro orr oru orz ou- ouc oue ouh ouk ouo our oze ozo ozu ozz rcc rce rch rco rcr rcu re- rec ree reh rek reo rer reu rez rh- rhc rhe rhh rho rhr rhu rkc rke rkk rko rku rkz roc roe roh rok roo ror rou roz rrc rrh rrk rrr rru ruc rue ruh ruk ruo rur ruu ruz rze rzo ucc uce uch uck uco ucr ucu uec uee ueh uer uhc uhe uhh uho uhr uhu ukc uke ukk ukr uku ukz uoc uoe uok uoo uor ur- urc ure urk uro urr uru urz uuc uue uur uuu uzh uzo uzu zce zco zec zee zeh zek zeo zer zez zhc zhe zho zhr zhu zo- zoc zoe zok zoo zor zou zrh zro zuc zuk zur zuz zzr zzz