a-a a-b aaa aab aad aaj aao ab- aba abb abd abj abo ad- ada adb add adj ado aja ajb ajd ajj ajo aoa aob aod aoj aoo baa bab bad baj bao bba bbb bbd bbo bda bdb bdd bdj bdo bja bjd bjj boa bob bod boj boo daa dab dad daj dao dba dbb dbd dbo dda ddb ddd ddo dj- dja djb djd djo doa dob dod doj doo j-d jaa jab jad jaj jao jba jbj jbo jda jdb jdo jja jjb jjj joa job jod joj joo oaa oab oad oaj oao ob- oba obb obd obj obo oda odb odd odo oja ojb ojd ojo oo- ooa oob ood ooo