a-a a-b a-c aaa aab aac aad aae aap aas ab- aba abb abc abd abe abp abs ac- aca acb acc acd ace acp acs ad- ada adb adc add ade adp ads aea aeb aec aed aee aep aes ap- apa apb apc apd ape app aps as- asa asb asc asd ase asp ass b-p baa bab bac bad bae bap bas bba bbb bbc bbd bbe bbp bbs bca bcb bcc bcd bce bcp bcs bda bdb bdc bdd bde bdp bds be- bea beb bec bed bee bep bes bpa bpb bpc bpd bpe bpp bps bsa bsb bsc bsd bse bsp bss c-- caa cab cac cad cae cap cas cba cbb cbc cbd cbe cbp cbs cca ccb ccc ccd cce ccp ccs cda cdb cdc cdd cde cdp cds ce- cea ceb cec ced cee cep ces cpa cpb cpc cpd cpe cpp cps csa csb csc csd cse csp css daa dab dac dad dae dap das dba dbb dbc dbd dbe dbp dbs dca dcb dcc dcd dce dcp dcs dda ddb ddc ddd dde ddp dds de- dea deb dec ded dee dep des dpa dpb dpc dpd dpe dpp dps dsa dsb dsc dsd dse dsp dss eaa eab eac ead eae eap eas eba ebb ebc ebd ebe ebp ebs ec- eca ecb ecc ecd ece ecs ed- eda edb edc edd ede edp eds eea eeb eec eed eee eep ees ep- epa epb epc epd epe epp eps es- esa esb esc esd ese esp ess p-p paa pab pac pad pae pap pas pba pbb pbc pbd pbe pbp pbs pca pcb pcc pcd pce pcp pcs pda pdb pdc pdd pde pdp pds pea peb pec ped pee pep pes ppa ppb ppc ppd ppe ppp pps ps- psa psb psc psd pse psp pss saa sab sac sad sae sap sas sba sbb sbc sbd sbe sbp sbs sca scb scc scd sce scp scs sda sdb sdc sdd sde sdp sds se- sea seb sec sed see sep ses spa spb spc spd spe spp sps ss- ssa ssb ssc ssd sse ssp sss