a-a a-b a-t aaa aab aan aao aas aat aau aax ab- aba abb abn abo abs abt abu abx an- ana anb ann ano ans ant anu anx aoa aob aon aoo aos aot aou aox as- asa asb asn aso ass ast asu asx at- ata atb atn ato ats att atu atx au- aua aub aun auo aus aut aux ax- axa axn axo axs axt axx b-u baa bab ban bao bas bat bau bax bba bbb bbn bbo bbs bbt bbu bbx bna bnb bnn bno bns bnt bnu bnx boa bob bon boo bos bot bou box bsa bsb bsn bso bss bst bsu bsx bta btb btn bto bts btt btu btx bua bub bun buo bus but buu bux bxb bxn bxo bxx naa nab nan nao nas nat nau nax nba nbb nbn nbo nbs nbt nbu nbx nna nnb nnn nno nns nnt nnu no- noa nob non noo nos not nou nox nsa nsb nsn nso nss nst nsu nsx nta ntb ntn nto nts ntt ntu ntx nua nub nun nuo nus nut nuu nux nxt oaa oab oan oao oas oat oau oax ob- oba obb obn obo obs obt obu obx on- ona onb onn ono ons ont onu onx oo- ooa oob oon ooo oos oot oox os- osa osb osn oso oss ost osu osx ot- ota otb otn oto ots ott otu ou- oua oun ouo ous out ox- oxa oxb oxn oxo oxt oxx saa sab san sao sas sat sau sax sba sbb sbn sbo sbs sbt sbu sbx sna snb snn sno sns snt snu soa sob son soo sos sot sou sox ss- ssa ssb ssn sso sss sst ssu ssx sta stb stn sto sts stt stu stx sua sub sun suo sus sut suu sux sxn sxs sxt sxu t-x taa tab tan tao tas tat tau tax tba tbb tbn tbo tbs tbt tbu tna tnb tnn tno tns tnt tnx to- toa tob ton too tos tot tou tox tsa tsb tsn tso tss tst tsu tsx tta ttb ttn tto tts ttt ttu ttx tua tub tun tuo tus tut tuu tux txn txs txt txu ua- uaa uab uan uao uas uat uau uba ubb ubn ubo ubs ubt ubu ubx un- una unb unn uno uns unt unu unx uoa uob uon uoo uos uot uox usa usb usn uso uss ust usu usx uta utb utn uto uts utt utu utx uua uun uus uut uuu uxb uxo uxt uxu xaa xan xas xat xau xbx xna xno xns xnu xoa xon xoo xos xot xox xsa xsb xss xst xts xtx xun xus xxo xxx