a-a aaa aag aan aao aar aax ag- aga agg agn ago agr agx an- ana ang ann ano anr anx aoa aog aon aoo aor aox ar- ara arg arn aro arr arx ax- axa axn axo axr axx gaa gag gan gao gar gga ggg ggn ggo ggr gna gnn gno gnr goa gog gon goo gor gox gra grg grn gro grr grx gxa naa nag nan nao nar nax nga ngg ngn ngo nna nng nnn nno no- noa nog non noo nor nox nra nrg nrn nro nrr nrx oaa oag oan oao oar oax oga ogg ogn ogo ogx on- ona ong onn ono onr onx oo- ooa oog oon ooo oor oox or- ora org orn oro orr orx ox- oxa oxn oxo oxx ra- raa rag ran rao rar rax rga rgg rgn rgo rgr rgx rna rng rnn rno rnr roa rog ron roo ror rox rra rrg rrn rrr rxr xaa xag xan xar xna xno xoa xog xon xoo xor xox xrx xxo xxx