-ic a-a a-b a-c a-i a-t aaa aab aac aai aan aao aap aat ab- aba abb abc abi abn abo abp abt ac- aca acb acc aci acn aco acp act ai- aia aib aic aii ain aio aip ait an- ana anb anc ani ann ano anp ant aoa aob aoc aoi aon aoo aop aot ap- apa apb apc api apn apo app apt at- ata atb atc ati atn ato atp att b-p baa bab bac bai ban bao bap bat bba bbb bbc bbi bbn bbo bbp bbt bca bcb bcc bci bcn bco bcp bct bi- bia bib bic bii bin bio bip bit bna bnb bnc bni bnn bno bnp bnt boa bob boc boi bon boo bop bot bpa bpb bpc bpi bpn bpo bpp bpt bta btb btc bti btn bto btp btt c-- caa cab cac cai can cao cap cat cba cbb cbc cbi cbn cbo cbp cbt cca ccb ccc cci ccn cco ccp cct ci- cia cib cic cii cin cio cip cit cn- cna cnb cnc cni cnn cno cnp cnt co- coa cob coc coi con coo cop cot cpa cpb cpc cpi cpn cpo cpp cpt cta ctb ctc cti ctn cto ctp ctt ia- iaa iab iac iai ian iao iap iat iba ibb ibc ibi ibn ibo ibp ibt ica icb icc ici icn ico icp ict iia iib iic iii iin iio iip iit in- ina inb inc ini inn ino inp int io- ioa iob ioc ioi ion ioo iop iot ipa ipb ipc ipi ipn ipo ipp ipt ita itb itc iti itn ito itp itt n-i naa nab nac nai nan nao nap nat nba nbb nbc nbi nbn nbo nbp nbt nca ncb ncc nci ncn nco ncp nct nia nib nic nii nin nio nip nit nna nnb nnc nni nnn nno nnp nnt no- noa nob noc noi non noo nop not npa npb npc npi npn npo npp npt nta ntb ntc nti ntn nto ntp ntt o-i oaa oab oac oai oan oao oap oat ob- oba obb obc obi obn obo obp obt oc- oca ocb occ oci ocn oco ocp oct oia oib oic oii oin oio oip oit on- ona onb onc oni onn ono onp ont oo- ooa oob ooc ooi oon ooo oop oot op- opa opb opc opi opn opo opp opt ot- ota otb otc oti otn oto otp ott p-p paa pab pac pai pan pao pap pat pba pbb pbc pbi pbn pbo pbp pbt pca pcb pcc pci pcn pco pcp pct pia pib pic pii pin pio pip pit pn- pna pnb pnc pni pnn pno pnp pnt poa pob poc poi pon poo pop pot ppa ppb ppc ppi ppn ppo ppp ppt pt- pta ptb ptc pti ptn pto ptp ptt taa tab tac tai tan tao tap tat tba tbb tbc tbi tbn tbo tbp tbt tca tcb tcc tci tcn tco tcp tct tia tib tic tii tin tio tip tit tna tnb tnc tni tnn tno tnp tnt to- toa tob toc toi ton too top tot tpa tpb tpc tpi tpn tpo tpp tpt tta ttb ttc tti ttn tto ttp ttt