cccc cccp cccs ccee ccpe ccpp ccpr ccps ccrc ccre ccrp ccrs ccsp ccss cec- cece cecp cecs ceec cees ceke cepc cepe cepp cepr ceps cer- cerc cere cerp cers cesc cese cesp cesr cess ckck ckcs cker ckpc ckpr ckrc cpce cpcs cpep cper cpps cpre cprs cpsc cpsk cpsr crcc crce crcr cre- crec cree crep cres crkc crkp crpc crps crsp crss cscc csce cscr cscs csec csee csep cser csks cspc cspe csps csrc csrs csse cssr eccc ecce eces ecks ecpp ecrc ecrr ecsc ecse ecsp ecss eecs eeee eees eeke eeks eeps eerc eers eese eesk ekek eker ekes ekpe epcc epec epee eper epes eppc eppp epps eprp eprs epsc epsp epss ercc erce ercp erec erer eres erke erks erpe erps errc erre errs erse esce escr escs esee esek eser eses eske esks espc espe espp esps esse essp kccc kcck kccr kcec kcee kcep kckc kckk kckr kcpc kcpr kcps kcrc kcrp kcrr kcrs kcsc kcse kcsp kcsr kcss keck kecr keek keep keer kees kekc keke keks kep- kepc kepe keps ker- kerc kere kerk kerp kerr kers kesc kesk kesp kesr kess kkck kkcr kkcs kkkk kkpc kkpk kkps kkrc kkre kkrk kkrr kkrs kkse kksp kksr kkss kpcc kpcr kpcs kpek kper kpke kpkk kpkr kppc kppk kppp kppr kprc kpre kprk kprp kprr kprs kpsc kpsp krcc krce krcs krec kree krek kres krkc krke krkk krkr krks krpr krps krrc krre krrk krrr krrs krsc krse krsk krsr krss ksce ksck kscr kscs ksec ksee ksek ksep kser kske kskk kskr ksks kspc kspe kspk kspr ksps ksrp ksrr ksrs ksse kssr ksss pccc pcce pccs pcep pcer pcks pcpp pcps pcrc pcre pcse pece peck pecr pecs peec peek peep peer pees peke pekk pepe peps per- perc pere perk perp perr pers pese pess pkcs ppcc ppcs pper pppp ppps pprc ppss prcc prcp prcs pre- prec pree prek prep pres prps prrs prsc prse prss psec pspp pspr psps psrk psrp pssc psse rccc rccs rcep rcps rcsc rcss recc rece reck recp recr recs reek reep rees reke reks repe repp repr reps rere rers rese resp ress rkss rpcs rpps rrrr rrsp rscc rscs rsee rspk rsps rsre sccc scce sccp sccs scec scee scep scer sck- scpe scps scr- scrc scre scrs scsc scsr se-c se-e se-k se-s sec- secc sece seck secr secs seec seek seep seer sees seke sekk sepe sepp sepr seps serc sere serk serp serr sers sesc sese sess skee skep sker skes skpc skss spcc spcs spec spee spek sper spes spke spkr spps sprs spse spsp spss srcc srec sres srpc srps srsp sscc ssce sscp sscs ssec ssee ssep sses sspc sspe ssps ssrc ssrs sssc ssss