-ic a-a a-b a-c a-i a-t aaa aab aac aae aai aam aan aao aat ab- aba abb abc abe abi abm abn abo abt ac- aca acb acc ace aci acm acn aco act aea aeb aec aee aei aem aen aeo aet ai- aia aib aic aie aii aim ain aio ait ama amb amc ame ami amm amn amo amt an- ana anb anc ane ani anm ann ano ant aoa aob aoc aoe aoi aom aon aoo aot at- ata atb atc ate ati atm atn ato att baa bab bac bae bai bam ban bao bat bba bbb bbc bbe bbi bbm bbn bbo bbt bca bcb bcc bce bci bcm bcn bco bct be- bea beb bec bee bei bem ben beo bet bi- bia bib bic bie bii bim bin bio bit bma bmb bmc bme bmi bmm bmn bmo bmt bna bnb bnc bne bni bnn bno bnt boa bob boc boe boi bom bon boo bot bta btb btc bte bti btm btn bto btt c-- caa cab cac cae cai cam can cao cat cba cbb cbc cbe cbi cbm cbn cbo cbt cca ccb ccc cce cci ccm ccn cco cct ce- cea ceb cec cee cei cem cen ceo cet ci- cia cib cic cie cii cim cin cio cit cma cmb cmc cme cmi cmm cmn cmo cmt cn- cna cnb cnc cne cni cnm cnn cno cnt co- coa cob coc coe coi com con coo cot cta ctb ctc cte cti ctm ctn cto ctt eaa eab eac eae eai eam ean eao eat eba ebb ebc ebe ebi ebm ebn ebo ebt ec- eca ecb ecc ece eci ecm ecn eco ect eea eeb eec eee eem een eeo eet eia eib eic eie eii eim ein eio eit em- ema emb emc eme emi emm emn emo emt en- ena enb enc ene eni enm enn eno ent eo- eoa eob eoc eoe eoi eom eon eoo eot eta etb etc ete eti etm etn eto ett ia- iaa iab iac iae iai iam ian iao iat iba ibb ibc ibe ibi ibm ibn ibo ibt ica icb icc ice ici icm icn ico ict ie- iea iec iee iei iem ien iet iia iib iic iie iii iim iin iio iit im- ima imb imc ime imi imm imn imo imt in- ina inb inc ine ini inm inn ino int io- ioa iob ioc ioe ioi iom ion ioo iot ita itb itc ite iti itm itn ito itt m-o maa mab mac mae mai mam man mao mat mba mbb mbc mbe mbi mbm mbo mbt mc- mca mcb mcc mce mci mcm mcn mco mct mea meb mec mee mei mem men meo met mi- mia mib mic mie mii mim min mio mit mma mmb mmc mme mmi mmm mmn mmo mmt mna mnb mnc mne mni mnm mnn mno mnt moa mob moc moe moi mom mon moo mot mta mtb mtc mte mti mtm mtn mto mtt n-i naa nab nac nae nai nam nan nao nat nba nbb nbc nbe nbi nbm nbn nbo nbt nca ncb ncc nce nci ncm ncn nco nct ne- nea neb nec nee nei nem nen neo net nia nib nic nie nii nim nin nio nit nma nmb nmc nme nmi nmm nmn nmo nmt nna nnb nnc nne nni nnm nnn nno nnt no- noa nob noc noe noi nom non noo not nta ntb ntc nte nti ntm ntn nto ntt o-i oaa oab oac oae oai oam oan oao oat ob- oba obb obc obe obi obm obn obo obt oc- oca ocb occ oci ocm ocn oco oct oea oeb oec oee oei oem oen oeo oet oia oib oic oie oii oim oin oio oit om- oma omb omc ome omi omm omn omo omt on- ona onb onc one oni onn ono ont oo- ooa oob ooc ooi oom oon ooo oot ot- ota otb otc ote oti otm otn oto ott taa tab tac tae tai tam tan tao tat tba tbb tbc tbe tbi tbm tbn tbo tbt tca tcb tcc tce tci tcm tcn tco tct te- tea teb tec tee tei tem ten teo tet tia tib tic tie tii tim tin tio tit tma tmb tmc tme tmi tmm tmn tmo tmt tna tnb tnc tne tni tnm tnn tno tnt to- toa tob toc toe toi tom ton too tot tta ttb ttc tte tti ttm ttn tto ttt