a-a a-b a-c aaa aab aac aad aae aam aax ab- aba abb abc abd abe abm abx ac- aca acb acc acd ace acm acx ad- ada adb adc add ade adm adx aea aeb aec aed aee aem aex ama amb amc amd ame amm amx ax- axa axe axm axx baa bab bac bad bae bam bax bba bbb bbc bbd bbe bbm bbx bca bcb bcc bcd bce bcm bcx bda bdb bdc bdd bde bdm bdx be- bea beb bec bed bee bem bex bma bmb bmc bmd bme bmm bmx bxb bxd bxm bxx c-- caa cab cac cad cae cam cax cba cbb cbc cbd cbe cbm cbx cca ccb ccc ccd cce ccm ccx cda cdb cdc cdd cde cdm cdx ce- cea ceb cec ced cee cem cex cma cmb cmc cmd cme cmm cmx cxc cxx daa dab dac dad dae dam dax dba dbb dbc dbd dbe dbm dbx dca dcb dcc dcd dce dcm dcx dda ddb ddc ddd dde ddm ddx de- dea deb dec ded dee dem dex dma dmb dmc dmd dme dmm dmx dxc dxd dxx eaa eab eac ead eae eam eax eba ebb ebc ebd ebe ebm ebx ec- eca ecb ecc ecd ece ecm ecx ed- eda edb edc edd ede edm edx eea eeb eec eed eee eem eex em- ema emb emc emd eme emm emx ex- exa exc exd exe exx maa mab mac mad mae mam max mba mbb mbc mbd mbe mbm mbx mc- mca mcb mcc mcd mce mcm mcx mda mdb mdc mdd mde mdm mdx mea meb mec med mee mem mex mma mmb mmc mmd mme mmm mmx mxa mxc mxd xaa xac xad xam xbc xbe xbx xcb xcd xcx xda xdb xdc xde xdm xed xee xem xex xma xmc xmd xmm xmx xxx