nfra nfrs nfsr nnes nnnn nnsa nnss nrab nras nrca nrcs nren nrfc nrna nrrc nrsa nrsc nsaa nsac nsar nsca nscc nscs nseb nsec nser nsfc nsfs nsna nsnr nsra nsrc nssa nssb nssc nsse nssf nssr nsss raab raaf raan raas raba rabb rabe rabs rac- raca racc race racs raec raef raen raer raes rafa rafc rafe raff rana ranc rane rann rans rara rarb rare rarf rars rasa rasc rase rass rbaf rbbb rbbr rbbs rbss rcac rcaf rcas rcbc rccb rccc rccs rcfc rcnr rcsa rcsc rcss rea- reac reae reaf rean rear reas reba rebb rebe rebs reca recc rece recr recs reeb reef reen rees refe reff refn refr refs rena rene renn rens rera rere rers resa rese resn ress rfae rfef rffc rnaf rnas rnbr rncs rras rrfc rrna rrrr rsaa rsaf rscc rscn rscs rsee rsfc rsna rsnn rsnr rsre rssa sa-c saab saac saae saaf saan saar saas saba sabb sabc sabe sabr sabs saca sacc sace sacn sacr sacs saeb saen saer saes safa safb safc safe saff safr sana sane sann sanr sans sara sarc sare sarf sarn sarr sars sasa sasc sase sasf sass sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbef sber sbfc sbsa sbse scaa scab scac scaf scan scar scas scba sccc scce sccs scea scec scee scer scfa scfc scfe scna scnr scr- scra scrc scre scrn scrs scsa scsc scsn scsr se-c se-e se-f se-n se-s seaa seab seac seaf sean sear seas seba sebe sebs sec- seca secc sece secn secr secs seea seeb seec seef seen seer sees sefa seff sena sene senn senr sens sera serb serc sere serf sern serr sers sesa sesc sese sess sfar sfas sfba sfbc sfca sfcc sfcs sfer sffc sfnb sfne sfra sfrc sfss snab snar snas snba snca sncc sncf sneb snee sner snes snns snra snrs sraf sras srbc srcc sreb srec sres srfc srna srnn ssaa ssab ssac ssan ssas ssbn ssbr ssca sscc ssce sscs ssec ssee sses ssfc ssns ssra ssrc ssrs sssa sssb sssc sssf ssss