a-a a-b a-c aaa aab aac aad aae aap ab- aba abb abc abd abe abp ac- aca acb acc acd ace acp ad- ada adb adc add ade adp aea aeb aec aed aee aep ap- apa apb apc apd ape app b-p baa bab bac bad bae bap bba bbb bbc bbd bbe bbp bca bcb bcc bcd bce bcp bda bdb bdc bdd bde bdp be- bea beb bec bed bee bep bpa bpb bpc bpd bpe bpp c-- caa cab cac cad cae cap cba cbb cbc cbd cbe cbp cca ccb ccc ccd cce ccp cda cdb cdc cdd cde cdp ce- cea ceb cec ced cee cep cpa cpb cpc cpd cpe cpp daa dab dac dad dae dap dba dbb dbc dbd dbe dbp dca dcb dcc dcd dce dcp dda ddb ddc ddd dde ddp de- dea deb dec ded dee dep dpa dpb dpc dpd dpe dpp eaa eab eac ead eae eap eba ebb ebc ebd ebe ebp ec- eca ecb ecc ecd ece ed- eda edb edc edd ede edp eea eeb eec eed eee eep ep- epa epb epc epd epe epp p-p paa pab pac pad pae pap pba pbb pbc pbd pbe pbp pca pcb pcc pcd pce pcp pda pdb pdc pdd pde pdp pea peb pec ped pee pep ppa ppb ppc ppd ppe ppp