a-a a-t aaa aaf aam aao aar aat aax af- afa aff afm afo afr aft afx ama amf amm amo amr amt amx aoa aof aom aoo aor aot aox ar- ara arf arm aro arr art arx at- ata atf atm ato atr att atx ax- axa axm axo axr axt axx faa faf fam fao far fat fax ffa fff ffm ffo ffr fft ffx fma fmf fmm fmo fmr fmt fmx foa fof fom foo for fot fox fra frf frm fro frr frt fta ftf ftm fto ftr ftt ftx fxm fxr fxt fxx m-f m-o m-r maa maf mam mao mar mat max mfa mff mfm mfo mfr mft mma mmf mmm mmo mmr mmt mmx moa mof mom moo mor mot mox mra mrf mrm mro mrr mrt mrx mta mtf mtm mto mtr mtt mtx mxa mxr oaa oaf oam oao oar oat oax of- ofa off ofm ofo ofr oft ofx om- oma omf omm omo omr omt omx oo- ooa oof oom ooo oor oot oox or- ora orf orm oro orr ort orx ot- ota otf otm oto otr ott ox- oxa oxf oxo oxt oxx ra- raa raf ram rao rar rat rax rfa rff rfm rfo rfr rft rma rmf rmm rmo rmr rmt rmx roa rof rom roo ror rot rox rra rrf rrm rrr rrt rta rtf rtm rto rtr rtt rtx rxr t-x taa taf tam tao tar tat tax tfa tff tfm tfo tfr tft tfx tma tmf tmm tmo tmr tmt tmx to- toa tof tom too tor tot tox tra trf trm tro trr trt trx tta ttf ttm tto ttr ttt ttx txf txt xaa xaf xam xar xat xfa xfm xft xfx xma xmf xmm xmo xmr xmt xmx xoa xof xom xoo xor xot xox xrf xrt xrx xtf xtm xtr xtx xxo xxx