-ic bbb bbc bbd bbi bbk bbr bby bcb bcc bcd bci bck bcr bcy bdb bdc bdd bdi bdk bdr bdy bi- bib bic bid bii bik bir biy bkb bkc bkk bkr brb brd bri brk brr bry by- byc byd byi byk byr c-- cbb cbc cbd cbi cbk cbr cby ccb ccc ccd cci cck ccr cdb cdc cdd cdi cdk cdr cdy ci- cib cic cid cii cik cir ckb ckc ckd cki cky crb crc crd cri crk crr cry cyb cyc cyd cyk cyr dbb dbc dbd dbi dbk dbr dby dcb dcc dcd dci dck dcr ddb ddc ddd ddi ddk ddr ddy di- dib dic did dii dik dir diy dkb dkc dki dkk dkr drb drc drd dri drk drr dry dy- dyb dyc dyd dyk dyr dyy i-d ibb ibc ibd ibi ibk ibr iby icb icc icd ici ick icr icy idb idc idd idi idk idr idy iib iic iid iii iir ikb ikc iki ikk ikr ir- irb irc ird iri irk irr iry iyc iyr iyy kbb kbc kbd kbi kbk kbr kcb kcc kcd kci kck kcr kdb kdc kdk kdr kdy kib kic kid kii kik kir kkb kkc kki kkk kkr kky krc krd kri krk krr kry kyc kyd kyr rbb rbc rbd rbi rbk rbr rcb rcc rcd rci rcr rdb rdc rdd rdi rdr rdy rib ric rid rii rik rir riy rkb rkc rkk rky rrb rrc rrd rri rrk rrr ry- ryc ryd ryk ryr ryy ybc ybi ybr yby ycc ycd yci ycy ydy yid yii yir yki ykk yrc yyb yyc yyy