a-a a-b a-i aaa aab aai aam aao aap aas aay ab- aba abb abi abm abo abp abs aby ai- aia aib aii aim aio aip ais aiy ama amb ami amm amo amp ams amy aoa aob aoi aom aoo aop aos ap- apa apb api apm apo app aps apy as- asa asb asi asm aso asp ass asy ay- aya ayi ayo ayp ays b-p baa bab bai bam bao bap bas bay bba bbb bbi bbm bbo bbp bbs bby bi- bia bib bii bim bio bip bis biy bma bmb bmi bmm bmo bmp bms boa bob boi bom boo bop bos boy bpa bpb bpi bpm bpo bpp bps bpy bsa bsb bsi bsm bso bsp bss bsy by- bya byi bym byo byp bys ia- iaa iab iai iam iao iap ias iba ibb ibi ibm ibo ibp ibs iby iia iib iii iim iio iip iis im- ima imb imi imm imo imp ims imy io- ioa iob ioi iom ioo iop ios ipa ipb ipi ipm ipo ipp ips ipy is- isa isb isi ism iso isp iss isy iya iym iyo iys iyy m-o maa mab mai mam mao map mas may mba mbb mbi mbm mbo mbp mbs mi- mia mib mii mim mio mip mis miy mma mmb mmi mmm mmo mmp mms moa mob moi mom moo mop mos moy mpa mpb mpi mpm mpo mpp mps msa msb msi msm mso msp mss msy my- mya myb mym myo mys o-i oaa oab oai oam oao oap oas ob- oba obb obi obm obo obp obs oby oia oib oii oim oio oip ois om- oma omb omi omm omo omp oms omy oo- ooa oob ooi oom ooo oop oos op- opa opb opi opm opo opp ops opy os- osa osb osi osm oso osp oss oya oyi oyo oys p-p paa pab pai pam pao pap pas pay pba pbb pbi pbm pbo pbp pbs pby pia pib pii pim pio pip pis pma pmb pmi pmm pmo pmp pms poa pob poi pom poo pop pos poy ppa ppb ppi ppm ppo ppp pps ps- psa psb psi psm pso psp pss psy py- pya pyb pym pyo pys saa sab sai sam sao sap sas say sba sbb sbi sbm sbo sbp sbs sby sia sib sii sim sio sip sis sma smb smi smm smo smp sms smy soa sob soi som soo sop sos soy spa spb spi spm spo spp sps spy ss- ssa ssb ssi ssm sso ssp sss sy- sya syb syi sym syp sys yaa yab yai yam yao yap yas yay ybi ybm ybp ybs yby yii yim yio yip yis yma ymi ymm ymo yms yob yoi yom yoo yop yos yoy ypa ypo yps ysa ysb ysi ysm yso ysp yss ysy yyb yys yyy