a-a a-b a-i aaa aab aad aae aag aai aam aax ab- aba abb abd abe abg abi abm abx ad- ada adb add ade adg adi adm adx aea aeb aed aee aeg aei aem aex ag- aga agb agd age agg agi agm agx ai- aia aib aid aie aig aii aim aix ama amb amd ame amg ami amm amx ax- axa axe axi axm axx baa bab bad bae bag bai bam bax bba bbb bbd bbe bbg bbi bbm bbx bda bdb bdd bde bdg bdi bdm bdx be- bea beb bed bee beg bei bem bex bga bgb bgd bge bgg bgi bgm bgx bi- bia bib bid bie big bii bim bix bma bmb bmd bme bmg bmi bmm bmx bxb bxd bxi bxm bxx daa dab dad dae dag dai dam dax dba dbb dbd dbe dbg dbi dbm dbx dda ddb ddd dde ddg ddi ddm ddx de- dea deb ded dee deg dei dem dex dga dgd dge dgg dgi dgm di- dia dib did die dig dii dim dix dma dmb dmd dme dmg dmi dmm dmx dxd dxi dxx eaa eab ead eae eag eai eam eax eba ebb ebd ebe ebg ebi ebm ebx ed- eda edb edd ede edg edi edm edx eea eeb eed eee eeg eem eex ega egb egd ege egg egi egm egx eia eib eid eie eig eii eim eix em- ema emb emd eme emg emi emm emx ex- exa exd exe exi exx g-d gaa gab gad gae gag gai gam gba gbd gbe gbg gbi gbm gbx gda gdb gdd gde gdi gdm gdx ge- gea geb ged gee geg gei gem gex gga ggb ggd ggg ggi ggm gia gib gid gie gig gii gim gma gmb gmd gme gmg gmi gmm gmx gxa i-d ia- iaa iab iad iae iag iai iam iba ibb ibd ibe ibg ibi ibm ibx ida idb idd ide idg idi idm idx ie- iea ied iee ieg iei iem iex iga igb igd ige igg igi igm iia iib iid iie iii iim iix im- ima imb imd ime img imi imm imx ixe ixi maa mab mad mae mag mai mam max mba mbb mbd mbe mbg mbi mbm mbx mda mdb mdd mde mdg mdi mdm mdx mea meb med mee meg mei mem mex mga mgb mgd mge mgi mgm mgx mi- mia mib mid mie mig mii mim mix mma mmb mmd mme mmg mmi mmm mmx mxa mxd mxi xaa xad xag xam xbe xbx xda xdb xde xdi xdm xed xee xeg xem xex xge xgi xia xie xii xix xma xmd xmg xmi xmm xmx xxi xxx