nbb nbc nbe nbg nbi nbk nbn nbr nbs nbt nbu nca ncb ncc nce ncg nci nck ncn ncr ncs nct ncu ne- nea neb nec nee neg nei nek nen ner nes net neu nga ngb ngc nge ngg ngi ngk ngn ngs ngt ngu nia nib nic nie nig nii nik nin nir nis nit niu nka nkc nke nki nkk nkn nkr nks nkt nku nna nnb nnc nne nng nni nnk nnn nns nnt nnu nra nrb nrc nre nrg nri nrk nrn nrr nrs nrt nru nsa nsb nsc nse nsg nsi nsk nsn nsr nss nst nsu nta ntb ntc nte ntg nti ntk ntn ntr nts ntt ntu nua nub nuc nue nug nui nuk nun nur nus nut nuu ra- raa rab rac rae rag rai rak ran rar ras rat rau rba rbb rbc rbe rbg rbi rbk rbn rbr rbs rbt rbu rca rcb rcc rce rcg rci rcn rcr rcs rct rcu re- rea reb rec ree reg rei rek ren rer res ret reu rga rgb rgc rge rgg rgi rgk rgn rgr rgs rgt ria rib ric rie rig rii rik rin rir ris rit rkb rkc rke rkg rkk rks rkt rku rna rnb rnc rng rni rnn rnr rns rnt rnu rra rrb rrc rrg rri rrk rrn rrr rrs rrt rru rsa rsb rsc rse rsg rsi rsk rsn rsr rss rst rsu rta rtb rtc rte rtg rti rtk rtn rtr rts rtt rtu rua rub ruc rue rug rui ruk run rur rus rut ruu saa sab sac sae sag sai sak san sar sas sat sau sba sbb sbc sbe sbg sbi sbk sbn sbr sbs sbt sbu sca scb scc sce scg sci sck scn scr scs sct scu se- sea seb sec see seg sei sek sen ser ses set seu sga sgb sgc sge sgg sgi sgk sgn sgr sgs sgt sgu sia sib sic sie sig sii sik sin sir sis sit siu sk- ska skb skc ske skg ski skk skr sks skt sku sna snb snc sne sng sni snk snn snr sns snt snu sr- sra srb src sre srg sri srk srn srr srs srt ss- ssa ssb ssc sse ssg ssi ssk ssn ssr sss sst ssu sta stb stc ste stg sti stk stn str sts stt stu sua sub suc sue sug sui suk sun sur sus sut suu taa tab tac tae tag tai tak tan tar tas tat tau tba tbb tbc tbe tbg tbi tbk tbn tbr tbs tbt tbu tca tcb tcc tce tcg tci tck tcn tcr tcs tct tcu te- tea teb tec tee teg tei tek ten ter tes tet teu tga tgb tgc tge tgg tgi tgk tgn tgr tgs tgt tgu tia tib tic tie tig tii tik tin tir tis tit tiu tka tkb tkc tke tkg tkk tkr tks tkt tna tnb tnc tne tng tni tnk tnn tnr tns tnt tra trb trc tre trg tri trk trn trr trs trt tru tsa tsb tsc tse tsg tsi tsk tsn tsr tss tst tsu tta ttb ttc tte ttg tti ttk ttn ttr tts ttt ttu tua tub tuc tue tug tui tuk tun tur tus tut tuu ua- uaa uab uac uae uag uai uak uan uar uas uat uau uba ubb ubc ube ubg ubi ubk ubn ubr ubs ubt ubu uca ucb ucc uce ucg uci uck ucn ucr ucs uct ucu uea ueb uec uee ueg uei uen uer ues uet uga ugb ugc uge ugg ugi ugk ugn ugr ugs ugt ugu uia uib uic uie uig uii uin uir uis uit uiu uka ukb ukc uke uki ukk ukn ukr uku un- una unb unc une ung uni unk unn unr uns unt unu ur- ura urb urc ure urg uri urk urn urr urs urt uru usa usb usc use usg usi usk usn usr uss ust usu uta utb utc ute uti utk utn utr uts utt utu uua uuc uue uug uun uur uus uut uuu