a-a a-b a-i aaa aab aad aag aai aar aau ab- aba abb abd abg abi abr abu ad- ada adb add adg adi adr adu ag- aga agb agd agg agi agr agu ai- aia aib aid aig aii air aiu ar- ara arb ard arg ari arr aru au- aua aub aud aug aui aur b-u baa bab bad bag bai bar bau bba bbb bbd bbg bbi bbr bbu bda bdb bdd bdg bdi bdr bdu bga bgb bgd bgg bgi bgr bgu bi- bia bib bid big bii bir biu bra brb brd brg bri brr bru bua bub bud bug bui bur buu daa dab dad dag dai dar dau dba dbb dbd dbg dbi dbr dbu dda ddb ddd ddg ddi ddr ddu dga dgd dgg dgi dgr dgu di- dia dib did dig dii dir diu dra drb drd drg dri drr dru dua dub dud dug dui dur g-d gaa gab gad gag gai gar gau gba gbd gbg gbi gbr gbu gda gdb gdd gdi gdr gdu gga ggb ggd ggg ggi ggr ggu gia gib gid gig gii gir giu gra grb grd grg gri grr gru gu- gua gub gud gug gui gur guu i-d ia- iaa iab iad iag iai iar iau iba ibb ibd ibg ibi ibr ibu ida idb idd idg idi idr idu iga igb igd igg igi igr igu iia iib iid iii iir iiu ir- ira irb ird irg iri irr iru iu- iua iub iud iug iui iur ra- raa rab rad rag rai rar rau rba rbb rbd rbg rbi rbr rbu rda rdb rdd rdg rdi rdr rdu rga rgb rgd rgg rgi rgr ria rib rid rig rii rir rra rrb rrd rrg rri rrr rru rua rub rud rug rui rur ruu ua- uaa uab uad uag uai uar uau uba ubb ubg ubi ubr ubu uda udb udd udg udi udr udu uga ugb ugg ugi ugr ugu uia uib uid uig uii uir uiu ur- ura urb urd urg uri urr uru uua uug uur uuu