a-a a-b aaa aab aam aan aao aas aay ab- aba abb abm abn abo abs aby ama amb amm amn amo ams amy an- ana anb anm ann ano ans any aoa aob aom aon aoo aos as- asa asb asm asn aso ass asy ay- aya ayn ayo ays baa bab bam ban bao bas bay bba bbb bbm bbn bbo bbs bby bma bmb bmm bmn bmo bms bna bnb bnn bno bns boa bob bom bon boo bos boy bsa bsb bsm bsn bso bss bsy by- bya bym byn byo bys m-o maa mab mam man mao mas may mba mbb mbm mbo mbs mma mmb mmm mmn mmo mms mna mnb mnm mnn mno mns moa mob mom mon moo mos moy msa msb msm msn mso mss msy my- mya myb mym myn myo mys naa nab nam nan nao nas nay nba nbb nbm nbn nbo nbs nma nmb nmm nmn nmo nms nna nnb nnm nnn nno nns no- noa nob nom non noo nos noy nsa nsb nsm nsn nso nss nsy nya nym nyn nyo nys nyy oaa oab oam oan oao oas ob- oba obb obm obn obo obs oby om- oma omb omm omn omo oms omy on- ona onb onn ono ons ony oo- ooa oob oom oon ooo oos os- osa osb osm osn oso oss oya oyo oys saa sab sam san sao sas say sba sbb sbm sbn sbo sbs sby sma smb smm smn smo sms smy sna snb snm snn sno sns sny soa sob som son soo sos soy ss- ssa ssb ssm ssn sso sss sy- sya syb sym syn sys yaa yab yam yan yao yas yay ybm ybs yby yma ymm ymo yms yna ynn yns yny yob yom yon yoo yos yoy ysa ysb ysm yso yss ysy yyb yys yyy