a-a a-c aaa aac aaf aaj aao ac- aca acc acf acj aco af- afa afc aff afj afo aja ajc ajf ajj ajo aoa aoc aof aoj aoo c-- c-j caa cac caf caj cao cca ccc ccf ccj cco cfa cfc cff cfo cja cjc cjf co- coa coc cof coj coo faa fac faf faj fao fca fcc fcf fcj fco ffa ffc fff ffo fja fjc foa foc fof foo jaa jac jaf jaj jao jca jcc jcf jco jfa jfc jff jfj jfo jja jjc jjf jjj joa joc jof joj joo oaa oac oaf oaj oao oc- oca occ ocf ocj oco of- ofa ofc off ofo oja ojc ojo oo- ooa ooc oof ooo