a-a a-b aaa aab aad aao aas aaw ab- aba abb abd abo abs abw ad- ada adb add ado ads adw aoa aob aod aoo aos aow as- asa asb asd aso ass asw aw- awa awb awd awo aws aww baa bab bad bao bas baw bba bbb bbd bbo bbs bbw bda bdb bdd bdo bds bdw boa bob bod boo bos bow bsa bsb bsd bso bss bsw bwa bwb bwd bwo bws daa dab dad dao das daw dba dbb dbd dbo dbs dda ddb ddd ddo dds ddw doa dob dod doo dos dow dsa dsb dsd dso dss dsw dwa dwb dwo dws dww oaa oab oad oao oas oaw ob- oba obb obd obo obs obw oda odb odd odo ods oo- ooa oob ood ooo oos oow os- osa osb osd oso oss osw owa owb owd owo ows oww saa sab sad sao sas saw sba sbb sbd sbo sbs sbw sda sdb sdd sdo sds sdw soa sob sod soo sos sow ss- ssa ssb ssd sso sss ssw swa swb swd swo sws waa wab wad wao was waw wba wbb wbd wbo wbs wbw wda wdb wds woa wob wod woo wos wow wsa wsb wsd wso wss wsw wwa wwd wwo www