a-a a-b aaa aab aag aaj aan aao aar ab- aba abb abg abj abn abo abr ag- aga agb agg agj agn ago agr aja ajb ajj ajn ajo ajr an- ana anb ang anj ann ano anr aoa aob aog aoj aon aoo aor ar- ara arb arg arj arn aro arr baa bab bag baj ban bao bar bba bbb bbg bbn bbo bbr bga bgb bgg bgn bgo bgr bja bjg bjj bjn bjr bna bnb bng bnj bnn bno bnr boa bob bog boj bon boo bor bra brb brg brj brn bro brr gaa gab gag gaj gan gao gar gba gbg gbj gbn gbo gbr gga ggb ggg ggj ggn ggo ggr gja gjg gjr gna gnb gnn gno gnr goa gob gog gon goo gor gra grb grg grj grn gro grr jaa jab jag jaj jan jao jar jba jbg jbj jbo jbr jga jgb jgn jgo jgr jja jjb jjg jjj jjr jna jng jnj jnn jno jnr joa job jog joj jon joo jor jra jrb jrg jrn jro jrr naa nab nag naj nan nao nar nba nbb nbg nbn nbo nbr nga ngb ngg ngj ngn ngo nja njn nna nnb nng nnn nno no- noa nob nog noj non noo nor nra nrb nrg nrj nrn nro nrr oaa oab oag oaj oan oao oar ob- oba obb obg obj obn obo obr oga ogg ogn ogo oja ojb ojo on- ona onb ong onj onn ono onr oo- ooa oob oog oon ooo oor or- ora orb org orn oro orr ra- raa rab rag raj ran rao rar rba rbb rbg rbn rbo rbr rga rgb rgg rgn rgo rgr rja rjg rjr rna rnb rng rnn rno rnr roa rob rog roj ron roo ror rra rrb rrg rrn rrr