-er a-a a-i a-t aaa aad aae aaf aai aar aat aax ad- ada add ade adf adi adr adt adx aea aed aee aef aei aer aet aex af- afa afd afe aff afi afr aft afx ai- aia aid aie aif aii air ait aix ar- ara ard are arf ari arr art arx at- ata atd ate atf ati atr att atx ax- axa axe axi axr axt axx daa dad dae daf dai dar dat dax dda ddd dde ddf ddi ddr ddt ddx de- dea ded dee def dei der det dex dfa dfd dfe dff dfi dfr dft dfx di- dia did die dif dii dir dit dix dra drd dre dri drr drt drx dta dtd dte dtf dti dtr dtt dtx dxd dxi dxr dxt dxx eaa ead eae eaf eai ear eat eax ed- eda edd ede edf edi edr edt edx eea eed eee eef eer eet eex ef- efa efd efe eff efi efr eft efx eia eid eie eif eii eir eit eix era erd ere erf eri err ert eta etd ete etf eti etr ett etx ex- exa exd exe exi exr ext exx faa fad fae faf fai far fat fax fda fdd fde fdf fdi fdr fdt fdx fea fed fee fef fei fer fet fex ffa ffd ffe fff ffi ffr fft ffx fia fid fie fif fii fir fit fix fra frd fre frf fri frr frt fta ftd fte ftf fti ftr ftt ftx fxe fxi fxr fxt fxx i-d i-f ia- iaa iad iae iaf iai iar iat ida idd ide idf idi idr idt idx ie- iea ied iee ief iei ier iet iex ifa ifd ife iff ifi ifr ift ifx iia iid iie iif iii iir iit iix ir- ira ird ire irf iri irr irt irx ita itd ite itf iti itt itx ixe ixi ra- raa rad rae raf rai rar rat rax rda rdd rde rdf rdi rdr rdt rdx re- rea red ree ref rei rer ret rex rfa rfd rfe rff rfi rfr rft ria rid rie rif rii rir rit rix rra rrd rrf rri rrr rrt rta rtd rte rtf rti rtr rtt rtx rxr t-x taa tad tae taf tai tar tat tax tda tdd tde tdf tdi tdr tdt tdx te- tea ted tee tef tei ter tet tex tfa tfd tfe tff tfi tfr tft tfx tia tid tie tif tii tir tit tix tra trd tre trf tri trr trt trx tta ttd tte ttf tti ttr ttt ttx txe txf txi txt xaa xad xaf xar xat xda xde xdf xdi xdr xdt xed xee xer xet xex xfa xfe xft xfx xia xie xii xit xix xrd xrf xrt xrx xtf xti xtr xtx xxi xxx