a-a a-b a-c aaa aab aac aad aae aas ab- aba abb abc abd abe abs ac- aca acb acc acd ace acs ad- ada adb adc add ade ads aea aeb aec aed aee aes as- asa asb asc asd ase ass baa bab bac bad bae bas bba bbb bbc bbd bbe bbs bca bcb bcc bcd bce bcs bda bdb bdc bdd bde bds be- bea beb bec bed bee bes bsa bsb bsc bsd bse bss c-- caa cab cac cad cae cas cba cbb cbc cbd cbe cbs cca ccb ccc ccd cce ccs cda cdb cdc cdd cde cds ce- cea ceb cec ced cee ces csa csb csc csd cse css daa dab dac dad dae das dba dbb dbc dbd dbe dbs dca dcb dcc dcd dce dcs dda ddb ddc ddd dde dds de- dea deb dec ded dee des dsa dsb dsc dsd dse dss eaa eab eac ead eae eas eba ebb ebc ebd ebe ebs ec- eca ecb ecc ecd ece ecs ed- eda edb edc edd ede eds eea eeb eec eed eee ees es- esa esb esc esd ese ess saa sab sac sad sae sas sba sbb sbc sbd sbe sbs sca scb scc scd sce scs sda sdb sdc sdd sde sds se- sea seb sec sed see ses ss- ssa ssb ssc ssd sse sss