-th a-a a-b a-t a-z aaa aab aah aao aas aat aaz ab- aba abb abh abo abs abt abz aha ahb ahh aho ahs aht ahz aoa aob aoh aoo aos aot as- asa asb ash aso ass ast asz at- ata atb ath ato ats att atz az- aza azb azo azs azt azz baa bab bah bao bas bat baz bba bbb bbh bbo bbs bbt bha bhb bhh bho bhs bht boa bob boh boo bos bot boz bsa bsb bsh bso bss bst bta btb bth bto bts btt btz bza bzh bzo bzs bzz haa hab hah hao has hat haz hba hbb hbh hbo hbs hbt hbz hha hhb hhh hho hhs hht hhz hoa hob hoh hoo hos hot hsa hsb hsh hss hst hsz hta htb hth hto hts htt htz hzo hzs hzt oaa oab oah oao oas oat ob- oba obb obh obo obs obt oha ohh oho ohs oht oo- ooa oob ooh ooo oos oot os- osa osb osh oso oss ost ot- ota otb oth oto ots ott otz oza ozo ozs ozt ozz saa sab sah sao sas sat saz sba sbb sbh sbo sbs sbt sh- sha shb shh sho shs sht soa sob soh soo sos sot soz ss- ssa ssb ssh sso sss sst ssz sta stb sth sto sts stt stz sza taa tab tah tao tas tat taz tba tbb tbh tbo tbs tbt tbz th- tha thb thh tho ths tht thz to- toa tob toh too tos tot toz tsa tsb tsh tso tss tst tta ttb tth tto tts ttt tza tzs zaa zab zah zao zas zat zaz zbb zbs zbt zha zho zhs zo- zoa zob zoo zos zot zsa zsh zst zsz zta zzs zzt zzz