a-a a-b a-i a-t aaa aab aad aag aai aar aat aau ab- aba abb abd abg abi abr abt abu ad- ada adb add adg adi adr adt adu ag- aga agb agd agg agi agr agt agu ai- aia aib aid aig aii air ait aiu ar- ara arb ard arg ari arr art aru at- ata atb atd atg ati atr att atu au- aua aub aud aug aui aur aut b-u baa bab bad bag bai bar bat bau bba bbb bbd bbg bbi bbr bbt bbu bda bdb bdd bdg bdi bdr bdt bdu bga bgb bgd bgg bgi bgr bgt bgu bi- bia bib bid big bii bir bit biu bra brb brd brg bri brr brt bru bta btb btd btg bti btr btt btu bua bub bud bug bui bur but buu daa dab dad dag dai dar dat dau dba dbb dbd dbg dbi dbr dbt dbu dda ddb ddd ddg ddi ddr ddt ddu dga dgd dgg dgi dgr dgt dgu di- dia dib did dig dii dir dit diu dra drb drd drg dri drr drt dru dta dtb dtd dtg dti dtr dtt dtu dua dub dud dug dui dur dut g-d gaa gab gad gag gai gar gat gau gba gbd gbg gbi gbr gbt gbu gda gdb gdd gdi gdr gdt gdu gga ggb ggd ggg ggi ggr ggt ggu gia gib gid gig gii gir git giu gra grb grd grg gri grr grt gru gta gtb gtd gtg gti gtr gtt gtu gu- gua gub gud gug gui gur gut guu i-d ia- iaa iab iad iag iai iar iat iau iba ibb ibd ibg ibi ibr ibt ibu ida idb idd idg idi idr idt idu iga igb igd igg igi igr igt igu iia iib iid iii iir iit iiu ir- ira irb ird irg iri irr irt iru ita itb itd itg iti itt itu iu- iua iub iud iug iui iur iut ra- raa rab rad rag rai rar rat rau rba rbb rbd rbg rbi rbr rbt rbu rda rdb rdd rdg rdi rdr rdt rdu rga rgb rgd rgg rgi rgr rgt ria rib rid rig rii rir rit rra rrb rrd rrg rri rrr rrt rru rta rtb rtd rtg rti rtr rtt rtu rua rub rud rug rui rur rut ruu taa tab tad tag tai tar tat tau tba tbb tbd tbg tbi tbr tbt tbu tda tdb tdd tdg tdi tdr tdt tdu tga tgb tgg tgi tgr tgt tgu tia tib tid tig tii tir tit tiu tra trb trd trg tri trr trt tru tta ttb ttd ttg tti ttr ttt ttu tua tub tud tug tui tur tut tuu ua- uaa uab uad uag uai uar uat uau uba ubb ubg ubi ubr ubt ubu uda udb udd udg udi udr udt udu uga ugb ugg ugi ugr ugt ugu uia uib uid uig uii uir uit uiu ur- ura urb urd urg uri urr urt uru uta utb utd uti utr utt utu uua uug uur uut uuu