a-a aaa aaf aaj aan aao aar af- afa aff afj afn afo afr aja ajf ajj ajn ajo ajr an- ana anf anj ann ano anr aoa aof aoj aon aoo aor ar- ara arf arj arn aro arr faa faf faj fan fao far ffa fff ffn ffo ffr fja fna fnf fnj fnn fnr foa fof fon foo for fra frf frj frn fro frr jaa jaf jaj jan jao jar jfa jff jfj jfo jfr jja jjf jjj jjr jna jnf jnj jnn jno jnr joa jof joj jon joo jor jra jrf jrn jro jrr naa naf naj nan nao nar nfa nff nfn nfo nfr nja njf njn nna nnf nnn nno no- noa nof noj non noo nor nra nrf nrj nrn nro nrr oaa oaf oaj oan oao oar of- ofa off ofn ofo ofr oja ojo on- ona onf onj onn ono onr oo- ooa oof oon ooo oor or- ora orf orn oro orr ra- raa raf raj ran rao rar rfa rff rfj rfn rfo rfr rja rjf rjr rna rnn rno rnr roa rof roj ron roo ror rra rrf rrn rrr