-ic bbb bbc bbg bbi bbn bbo bbt bcb bcc bcg bci bcn bco bct bgb bgc bgg bgi bgn bgo bgt bi- bib bic big bii bin bio bit bnb bnc bng bni bnn bno bnt bob boc bog boi bon boo bot btb btc btg bti btn bto btt c-- cbb cbc cbg cbi cbn cbo cbt ccb ccc ccg cci ccn cco cct cgb cgc cgg cgi cgn cgo cgt ci- cib cic cig cii cin cio cit cn- cnb cnc cng cni cnn cno cnt co- cob coc cog coi con coo cot ctb ctc ctg cti ctn cto ctt gbc gbg gbi gbn gbo gbt gcb gcc gcg gci gcn gco gct ggb ggc ggg ggi ggn ggo ggt gib gic gig gii gin gio git gnb gnc gni gnn gno gnt gob goc gog goi gon goo got gtb gtc gtg gti gtn gto gtt ibb ibc ibg ibi ibn ibo ibt icb icc icg ici icn ico ict igb igc igg igi ign igo igt iib iic iii iin iio iit in- inb inc ing ini inn ino int io- iob ioc iog ioi ion ioo iot itb itc itg iti itn ito itt n-i nbb nbc nbg nbi nbn nbo nbt ncb ncc ncg nci ncn nco nct ngb ngc ngg ngi ngn ngo ngt nib nic nig nii nin nio nit nnb nnc nng nni nnn nno nnt no- nob noc nog noi non noo not ntb ntc ntg nti ntn nto ntt o-i ob- obb obc obg obi obn obo obt oc- ocb occ ocg oci ocn oco oct ogc ogg ogi ogn ogo ogt oib oic oii oin oio oit on- onb onc ong oni onn ono ont oo- oob ooc oog ooi oon ooo oot ot- otb otc otg oti otn oto ott tbb tbc tbg tbi tbn tbo tbt tcb tcc tcg tci tcn tco tct tgb tgc tgg tgi tgn tgo tgt tib tic tig tii tin tio tit tnb tnc tng tni tnn tno tnt to- tob toc tog toi ton too tot ttb ttc ttg tti ttn tto ttt