-ic a-a a-b a-c a-i a-t aaa aab aac aai aao aap aat aay ab- aba abb abc abi abo abp abt aby ac- aca acb acc aci aco acp act acy ai- aia aib aic aii aio aip ait aiy aoa aob aoc aoi aoo aop aot ap- apa apb apc api apo app apt apy at- ata atb atc ati ato atp att ay- aya ayc ayi ayo ayp ayt b-p baa bab bac bai bao bap bat bay bba bbb bbc bbi bbo bbp bbt bby bca bcb bcc bci bco bcp bct bcy bi- bia bib bic bii bio bip bit biy boa bob boc boi boo bop bot boy bpa bpb bpc bpi bpo bpp bpt bpy bta btb btc bti bto btp btt bty by- bya byc byi byo byp byt c-- caa cab cac cai cao cap cat cay cba cbb cbc cbi cbo cbp cbt cby cca ccb ccc cci cco ccp cct ci- cia cib cic cii cio cip cit co- coa cob coc coi coo cop cot coy cpa cpb cpc cpi cpo cpp cpt cta ctb ctc cti cto ctp ctt cty cya cyb cyc cyo cyp cyt ia- iaa iab iac iai iao iap iat iba ibb ibc ibi ibo ibp ibt iby ica icb icc ici ico icp ict icy iia iib iic iii iio iip iit io- ioa iob ioc ioi ioo iop iot ipa ipb ipc ipi ipo ipp ipt ipy ita itb itc iti ito itp itt ity iya iyc iyo iyt iyy o-i oaa oab oac oai oao oap oat ob- oba obb obc obi obo obp obt oby oc- oca ocb occ oci oco ocp oct oia oib oic oii oio oip oit oo- ooa oob ooc ooi ooo oop oot op- opa opb opc opi opo opp opt opy ot- ota otb otc oti oto otp ott oya oyi oyo p-p paa pab pac pai pao pap pat pay pba pbb pbc pbi pbo pbp pbt pby pca pcb pcc pci pco pcp pct pia pib pic pii pio pip pit poa pob poc poi poo pop pot poy ppa ppb ppc ppi ppo ppp ppt pt- pta ptb ptc pti pto ptp ptt pty py- pya pyb pyc pyo pyt taa tab tac tai tao tap tat tay tba tbb tbc tbi tbo tbp tbt tca tcb tcc tci tco tcp tct tia tib tic tii tio tip tit tiy to- toa tob toc toi too top tot toy tpa tpb tpc tpi tpo tpp tpt tta ttb ttc tti tto ttp ttt tty tya tyc tyo typ tyt yaa yab yac yai yao yap yat yay ybc ybi ybp yby yca ycc yci yco ycp ycy yii yio yip yit yob yoc yoi yoo yop yot yoy ypa ypo yta ytc yto ytp ytt yyb yyc yyt yyy