a-a a-b a-c aaa aab aac aae aam aan aao aap ab- aba abb abc abe abm abn abo abp ac- aca acb acc ace acm acn aco acp aea aeb aec aee aem aen aeo aep ama amb amc ame amm amn amo amp an- ana anb anc ane anm ann ano anp aoa aob aoc aoe aom aon aoo aop ap- apa apb apc ape apm apn apo app b-p baa bab bac bae bam ban bao bap bba bbb bbc bbe bbm bbn bbo bbp bca bcb bcc bce bcm bcn bco bcp be- bea beb bec bee bem ben beo bep bma bmb bmc bme bmm bmn bmo bmp bna bnb bnc bne bnn bno bnp boa bob boc boe bom bon boo bop bpa bpb bpc bpe bpm bpn bpo bpp c-- caa cab cac cae cam can cao cap cba cbb cbc cbe cbm cbn cbo cbp cca ccb ccc cce ccm ccn cco ccp ce- cea ceb cec cee cem cen ceo cep cma cmb cmc cme cmm cmn cmo cmp cn- cna cnb cnc cne cnm cnn cno cnp co- coa cob coc coe com con coo cop cpa cpb cpc cpe cpm cpn cpo cpp eaa eab eac eae eam ean eao eap eba ebb ebc ebe ebm ebn ebo ebp ec- eca ecb ecc ece ecm ecn eco eea eeb eec eee eem een eeo eep em- ema emb emc eme emm emn emo emp en- ena enb enc ene enm enn eno enp eo- eoa eob eoc eoe eom eon eoo eop ep- epa epb epc epe epm epn epo epp m-o maa mab mac mae mam man mao map mba mbb mbc mbe mbm mbo mbp mc- mca mcb mcc mce mcm mcn mco mcp mea meb mec mee mem men meo mep mma mmb mmc mme mmm mmn mmo mmp mna mnb mnc mne mnm mnn mno mnp moa mob moc moe mom mon moo mop mpa mpb mpc mpe mpm mpn mpo mpp naa nab nac nae nam nan nao nap nba nbb nbc nbe nbm nbn nbo nbp nca ncb ncc nce ncm ncn nco ncp ne- nea neb nec nee nem nen neo nep nma nmb nmc nme nmm nmn nmo nmp nna nnb nnc nne nnm nnn nno nnp no- noa nob noc noe nom non noo nop npa npb npc npe npm npn npo npp oaa oab oac oae oam oan oao oap ob- oba obb obc obe obm obn obo obp oc- oca ocb occ ocm ocn oco ocp oea oeb oec oee oem oen oeo oep om- oma omb omc ome omm omn omo omp on- ona onb onc one onn ono onp oo- ooa oob ooc oom oon ooo oop op- opa opb opc ope opm opn opo opp p-p paa pab pac pae pam pan pao pap pba pbb pbc pbe pbm pbn pbo pbp pca pcb pcc pce pcm pcn pco pcp pea peb pec pee pem pen peo pep pma pmb pmc pme pmm pmn pmo pmp pn- pna pnb pnc pne pnm pnn pno pnp poa pob poc poe pom pon poo pop ppa ppb ppc ppe ppm ppn ppo ppp