-ic a-a a-b a-c a-i a-t aaa aab aac aae aai aam aan aat ab- aba abb abc abe abi abm abn abt ac- aca acb acc ace aci acm acn act aea aeb aec aee aei aem aen aet ai- aia aib aic aie aii aim ain ait ama amb amc ame ami amm amn amt an- ana anb anc ane ani anm ann ant at- ata atb atc ate ati atm atn att baa bab bac bae bai bam ban bat bba bbb bbc bbe bbi bbm bbn bbt bca bcb bcc bce bci bcm bcn bct be- bea beb bec bee bei bem ben bet bi- bia bib bic bie bii bim bin bit bma bmb bmc bme bmi bmm bmn bmt bna bnb bnc bne bni bnn bnt bta btb btc bte bti btm btn btt c-- caa cab cac cae cai cam can cat cba cbb cbc cbe cbi cbm cbn cbt cca ccb ccc cce cci ccm ccn cct ce- cea ceb cec cee cei cem cen cet ci- cia cib cic cie cii cim cin cit cma cmb cmc cme cmi cmm cmn cmt cn- cna cnb cnc cne cni cnm cnn cnt cta ctb ctc cte cti ctm ctn ctt eaa eab eac eae eai eam ean eat eba ebb ebc ebe ebi ebm ebn ebt ec- eca ecb ecc ece eci ecm ecn ect eea eeb eec eee eem een eet eia eib eic eie eii eim ein eit em- ema emb emc eme emi emm emn emt en- ena enb enc ene eni enm enn ent eta etb etc ete eti etm etn ett ia- iaa iab iac iae iai iam ian iat iba ibb ibc ibe ibi ibm ibn ibt ica icb icc ice ici icm icn ict ie- iea iec iee iei iem ien iet iia iib iic iie iii iim iin iit im- ima imb imc ime imi imm imn imt in- ina inb inc ine ini inm inn int ita itb itc ite iti itm itn itt maa mab mac mae mai mam man mat mba mbb mbc mbe mbi mbm mbt mc- mca mcb mcc mce mci mcm mcn mct mea meb mec mee mei mem men met mi- mia mib mic mie mii mim min mit mma mmb mmc mme mmi mmm mmn mmt mna mnb mnc mne mni mnm mnn mnt mta mtb mtc mte mti mtm mtn mtt n-i naa nab nac nae nai nam nan nat nba nbb nbc nbe nbi nbm nbn nbt nca ncb ncc nce nci ncm ncn nct ne- nea neb nec nee nei nem nen net nia nib nic nie nii nim nin nit nma nmb nmc nme nmi nmm nmn nmt nna nnb nnc nne nni nnm nnn nnt nta ntb ntc nte nti ntm ntn ntt taa tab tac tae tai tam tan tat tba tbb tbc tbe tbi tbm tbn tbt tca tcb tcc tce tci tcm tcn tct te- tea teb tec tee tei tem ten tet tia tib tic tie tii tim tin tit tma tmb tmc tme tmi tmm tmn tmt tna tnb tnc tne tni tnm tnn tnt tta ttb ttc tte tti ttm ttn ttt