a-a a-b a-c aaa aab aac aae aag aak aam aau ab- aba abb abc abe abg abk abm abu ac- aca acb acc ace acg ack acm acu aea aeb aec aee aeg aek aem aeu ag- aga agb agc age agg agk agm agu aka akb akc ake akg akk akm aku ama amb amc ame amg amk amm amu au- aua aub auc aue aug auk aum b-u baa bab bac bae bag bak bam bau bba bbb bbc bbe bbg bbk bbm bbu bca bcb bcc bce bcg bck bcm bcu be- bea beb bec bee beg bek bem beu bga bgb bgc bge bgg bgk bgm bgu bka bkb bkc bke bkg bkk bkm bma bmb bmc bme bmg bmk bmm bmu bua bub buc bue bug buk bum buu c-- caa cab cac cae cag cak cam cau cba cbb cbc cbe cbg cbk cbm cbu cca ccb ccc cce ccg cck ccm ccu ce- cea ceb cec cee ceg cek cem ceu cga cgb cgc cge cgg cgm cgu cka ckb ckc ckm cma cmb cmc cme cmg cmk cmm cmu cua cub cuc cue cug cuk cum cuu eaa eab eac eae eag eak eam eau eba ebb ebc ebe ebg ebk ebm ebu ec- eca ecb ecc ece ecg eck ecm ecu eea eeb eec eee eeg eek eem ega egb egc ege egg egm egu eka ekb ekc eke ekg eku em- ema emb emc eme emg emk emm emu eu- eua eub euc eue eug gaa gab gac gae gag gak gam gau gba gbc gbe gbg gbk gbm gbu gca gcb gcc gce gcg gck gcm gcu ge- gea geb gec gee geg gek gem geu gga ggb ggc ggg ggm ggu gka gkb gkm gma gmb gmc gme gmg gmm gu- gua gub guc gue gug guk gum guu ka- kaa kab kac kae kag kak kam kau kba kbb kbc kbe kbk kbm kbu kca kcb kcc kce kcg kck kcm kcu ke- kea keb kec kee keg kek kem kga kgb kgc kgm kgu kkb kkc kke kkk kkm kku kma kmb kmc kme kmg kmk kmm kmu kub kuc kue kug kuk kum kuu maa mab mac mae mag mak mam mau mba mbb mbc mbe mbg mbk mbm mbu mc- mca mcb mcc mce mcg mck mcm mcu mea meb mec mee meg mek mem meu mga mgb mgc mge mgk mgm mgu mka mkb mkc mke mkg mkk mkm mku mma mmb mmc mme mmg mmk mmm mmu mua mub muc mue mug muk mum muu ua- uaa uab uac uae uag uak uam uau uba ubb ubc ube ubg ubk ubu uca ucb ucc uce ucg uck ucm ucu uea ueb uec uee ueg uem uga ugb ugc uge ugg ugk ugm ugu uka ukb ukc uke ukk uku um- uma umb umc ume umg umm umu uua uuc uue uug uum uuu