a-a a-b a-z aaa aab aaj aao aar aaz ab- aba abb abj abo abr abz aja ajb ajj ajo ajr aoa aob aoj aoo aor ar- ara arb arj aro arr arz az- aza azb azo azz baa bab baj bao bar baz bba bbb bbo bbr bja bjj bjr boa bob boj boo bor boz bra brb brj bro brr brz bza bzo bzr bzz j-z jaa jab jaj jao jar jaz jba jbj jbo jbr jbz jja jjb jjj jjr joa job joj joo jor jra jrb jro jrr jrz oaa oab oaj oao oar ob- oba obb obj obo obr oja ojb ojo oo- ooa oob ooo oor or- ora orb oro orr orz oza ozo ozz ra- raa rab raj rao rar raz rba rbb rbo rbr rja rjr roa rob roj roo ror roz rra rrb rrr rza rzb rzo zaa zab zaj zao zar zaz zbb zbr zo- zoa zob zoo zor zro zzr zzz