-ic bbb bbc bbi bbn bbo bbt bby bcb bcc bci bcn bco bct bcy bi- bib bic bii bin bio bit biy bnb bnc bni bnn bno bnt bob boc boi bon boo bot boy btb btc bti btn bto btt bty by- byc byi byn byo byt c-- cbb cbc cbi cbn cbo cbt cby ccb ccc cci ccn cco cct ci- cib cic cii cin cio cit cn- cnb cnc cni cnn cno cnt cny co- cob coc coi con coo cot coy ctb ctc cti ctn cto ctt cty cyb cyc cyn cyo cyt ibb ibc ibi ibn ibo ibt iby icb icc ici icn ico ict icy iib iic iii iin iio iit in- inb inc ini inn ino int iny io- iob ioc ioi ion ioo iot itb itc iti itn ito itt ity iyc iyo iyt iyy n-i nbb nbc nbi nbn nbo nbt ncb ncc nci ncn nco nct nib nic nii nin nio nit nnb nnc nni nnn nno nnt no- nob noc noi non noo not noy ntb ntc nti ntn nto ntt nyc nyn nyo nyt nyy o-i ob- obb obc obi obn obo obt oby oc- ocb occ oci ocn oco oct oib oic oii oin oio oit on- onb onc oni onn ono ont ony oo- oob ooc ooi oon ooo oot ot- otb otc oti otn oto ott oyi oyo tbb tbc tbi tbn tbo tbt tcb tcc tci tcn tco tct tib tic tii tin tio tit tiy tnb tnc tni tnn tno tnt to- tob toc toi ton too tot toy ttb ttc tti ttn tto ttt tty tyc tyn tyo tyt ybc ybi yby ycc yci yco ycy yii yin yio yit ynn yny yob yoc yoi yon yoo yot yoy ytc ytn yto ytt yyb yyc yyt yyy