a-a aaa aaf aam aao aar aau af- afa aff afm afo afr afu ama amf amm amo amr amu aoa aof aom aoo aor aou ar- ara arf arm aro arr aru au- aua auf aum auo aur faa faf fam fao far fau ffa fff ffm ffo ffr ffu fma fmf fmm fmo fmr fmu foa fof fom foo for fou fra frf frm fro frr fru fua fuf fum fuo fur fuu m-f m-o m-r maa maf mam mao mar mau mfa mff mfm mfo mfr mfu mma mmf mmm mmo mmr mmu moa mof mom moo mor mou mra mrf mrm mro mrr mru mua muf mum mur muu oaa oaf oam oao oar oau of- ofa off ofm ofo ofr ofu om- oma omf omm omo omr omu oo- ooa oof oom ooo oor or- ora orf orm oro orr oru ou- oua ouf oum ouo our ra- raa raf ram rao rar rau rfa rff rfm rfo rfr rfu rma rmf rmm rmo rmr roa rof rom roo ror rou rra rrf rrm rrr rru rua ruf rum ruo rur ruu ua- uaa uaf uam uao uar uau ufa uff ufm ufo ufr ufu um- uma umf umm umo umr umu uoa uom uoo uor ur- ura urf urm uro urr uru uua uum uur uuu