-ic a-a a-b a-c a-i aaa aab aac aai aan aao aar aay ab- aba abb abc abi abn abo abr aby ac- aca acb acc aci acn aco acr acy ai- aia aib aic aii ain aio air aiy an- ana anb anc ani ann ano anr any aoa aob aoc aoi aon aoo aor ar- ara arb arc ari arn aro arr ary ay- aya ayc ayi ayn ayo ayr baa bab bac bai ban bao bar bay bba bbb bbc bbi bbn bbo bbr bby bca bcb bcc bci bcn bco bcr bcy bi- bia bib bic bii bin bio bir biy bna bnb bnc bni bnn bno bnr boa bob boc boi bon boo bor boy bra brb bri brn bro brr bry by- bya byc byi byn byo byr c-- caa cab cac cai can cao car cay cba cbb cbc cbi cbn cbo cbr cby cca ccb ccc cci ccn cco ccr ci- cia cib cic cii cin cio cir cn- cna cnb cnc cni cnn cno cnr cny co- coa cob coc coi con coo cor coy cra crb crc cri crn cro crr cry cya cyb cyc cyn cyo cyr ia- iaa iab iac iai ian iao iar iba ibb ibc ibi ibn ibo ibr iby ica icb icc ici icn ico icr icy iia iib iic iii iin iio iir in- ina inb inc ini inn ino inr iny io- ioa iob ioc ioi ion ioo ior ir- ira irb irc iri irn iro irr iry iya iyc iyo iyr iyy n-i naa nab nac nai nan nao nar nay nba nbb nbc nbi nbn nbo nbr nca ncb ncc nci ncn nco ncr nia nib nic nii nin nio nir nna nnb nnc nni nnn nno no- noa nob noc noi non noo nor noy nra nrb nrc nri nrn nro nrr nry nya nyc nyn nyo nyy o-i oaa oab oac oai oan oao oar ob- oba obb obc obi obn obo obr oby oc- oca ocb occ oci ocn oco ocr oia oib oic oii oin oio oir on- ona onb onc oni onn ono onr ony oo- ooa oob ooc ooi oon ooo oor or- ora orb orc ori orn oro orr ory oya oyi oyo ra- raa rab rac rai ran rao rar ray rba rbb rbc rbi rbn rbo rbr rca rcb rcc rci rcn rco rcr ria rib ric rii rin rio rir riy rna rnb rnc rni rnn rno rnr rny roa rob roc roi ron roo ror roy rra rrb rrc rri rrn rrr ry- rya ryc ryn ryo ryr ryy yaa yab yac yai yan yao yar yay ybc ybi ybr yby yca ycc yci yco ycy yii yin yio yir yna ynn yny yob yoc yoi yon yoo yor yoy yra yrc yrn yro yyb yyc yyy