a-a a-b a-c aaa aab aac aad aae aak aap aas ab- aba abb abc abd abe abk abp abs ac- aca acb acc acd ace ack acp acs ad- ada adb adc add ade adk adp ads aea aeb aec aed aee aek aep aes aka akb akc akd ake akk akp aks ap- apa apb apc apd ape apk app aps as- asa asb asc asd ase ask asp ass b-p baa bab bac bad bae bak bap bas bba bbb bbc bbd bbe bbk bbp bbs bca bcb bcc bcd bce bck bcp bcs bda bdb bdc bdd bde bdk bdp bds be- bea beb bec bed bee bek bep bes bka bkb bkc bke bkk bkp bks bpa bpb bpc bpd bpe bpp bps bsa bsb bsc bsd bse bsk bsp bss c-- caa cab cac cad cae cak cap cas cba cbb cbc cbd cbe cbk cbp cbs cca ccb ccc ccd cce cck ccp ccs cda cdb cdc cdd cde cdk cdp cds ce- cea ceb cec ced cee cek cep ces cka ckb ckc ckd cks cpa cpb cpc cpd cpe cpk cpp cps csa csb csc csd cse csk csp css daa dab dac dad dae dak dap das dba dbb dbc dbd dbe dbk dbp dbs dca dcb dcc dcd dce dck dcp dcs dda ddb ddc ddd dde ddk ddp dds de- dea deb dec ded dee dek dep des dka dkb dkc dke dkk dkp dks dpa dpb dpc dpd dpe dpk dpp dps dsa dsb dsc dsd dse dsk dsp dss eaa eab eac ead eae eak eap eas eba ebb ebc ebd ebe ebk ebp ebs ec- eca ecb ecc ecd ece eck ecs ed- eda edb edc edd ede edk edp eds eea eeb eec eed eee eek eep ees eka ekb ekc ekd eke ekp eks ep- epa epb epc epd epe epp eps es- esa esb esc esd ese esk esp ess ka- kaa kab kac kad kae kak kap kas kba kbb kbc kbd kbe kbk kbp kbs kca kcb kcc kcd kce kck kcp kcs kda kdb kdc kde kdk kdp kds ke- kea keb kec ked kee kek kep kes kkb kkc kke kkk kkp kks kpa kpc kpd kpe kpk kpp kps ksa ksb ksc ksd kse ksk ksp kss p-p paa pab pac pad pae pak pap pas pba pbb pbc pbd pbe pbk pbp pbs pca pcb pcc pcd pce pck pcp pcs pda pdb pdc pdd pde pdk pdp pds pea peb pec ped pee pek pep pes pka pkb pkc pkd pke pkp pks ppa ppb ppc ppd ppe ppk ppp pps ps- psa psb psc psd pse psk psp pss saa sab sac sad sae sak sap sas sba sbb sbc sbd sbe sbk sbp sbs sca scb scc scd sce sck scp scs sda sdb sdc sdd sde sdk sdp sds se- sea seb sec sed see sek sep ses sk- ska skb skc skd ske skk skp sks spa spb spc spd spe spk spp sps ss- ssa ssb ssc ssd sse ssk ssp sss