-ic -ol bbb bbc bbi bbk bbl bbo bbr bbt bbx bcb bcc bci bck bcl bco bcr bct bcx bi- bib bic bii bik bil bio bir bit bix bkb bkc bkk bkl bko bkr bkt bkx blb blc bli blk bll blo blr blt blx bob boc boi bok bol boo bor bot box brb bri brk brl bro brr brt brx btb btc bti btk btl bto btr btt btx bxb bxi bxl bxo bxx c-- cbb cbc cbi cbk cbl cbo cbr cbt cbx ccb ccc cci cck ccl cco ccr cct ccx ci- cib cic cii cik cil cio cir cit cix ckb ckc cki cko ckt ckx cl- clb clc cli clk cll clo clr clt clx co- cob coc coi cok col coo cor cot cox crb crc cri crk crl cro crr crt crx ctb ctc cti ctk ctl cto ctr ctt ctx cxc cxi cxk cxl cxo cxr cxt cxx ibb ibc ibi ibk ibl ibo ibr ibt ibx icb icc ici ick icl ico icr ict iib iic iii iil iio iir iit iix ikb ikc iki ikk ikl iko ikr ikt ikx il- ilb ilc ili ilk ill ilo ilr ilt ilx io- iob ioc ioi iol ioo ior iot ir- irb irc iri irk irl iro irr irt irx itb itc iti itk itl ito itt itx ixc ixi ixl k-t kbb kbc kbi kbk kbl kbo kbr kbx kcb kcc kci kck kcl kcr kct kcx kib kic kii kik kil kio kir kit kix kkb kkc kki kkk kkl kkr kkt kl- klb klc kli klo klr klt klx kob koc koi kok kol koo kor kot krc kri krk krl kro krr krt ktb ktc ktk ktl kto ktr ktt kxl kxo lbb lbc lbi lbk lbl lbo lbr lbt lbx lcb lcc lci lck lcl lco lcr lct lcx lib lic lii lik lil lio lir lit lix lkb lkl lkr lkt llb llc lli llk lll llo llr llt lob loc loi lok lol loo lor lot lox lrb lrc lri lrk lro lrr lrt ltb ltc lti ltk ltl lto ltr ltt ltx lxc lxi lxo lxr lxx o-i ob- obb obc obi obk obl obo obr obt obx oc- ocb occ oci ock ocl oco ocr oct ocx oib oic oii oik oil oio oir oit okb okc oki okk okl oko okr olb olc oli olk oll olo olt oo- oob ooc ooi ook ool ooo oor oot oox or- orb orc ori ork orl oro orr ort orx ot- otb otc oti otk otl oto otr ott ox- oxb oxc oxi oxo oxt oxx rbb rbc rbi rbk rbl rbo rbr rbt rbx rcb rcc rci rcl rco rcr rct rcx rib ric rii rik ril rio rir rit rix rkb rkc rkk rko rkt rlc rli rll rlo rlr rlt rob roc roi rok rol roo ror rot rox rrb rrc rri rrk rrl rrr rrt rtb rtc rti rtk rtl rto rtr rtt rtx rxr t-x tbb tbc tbi tbk tbl tbo tbr tbt tcb tcc tci tck tcl tco tcr tct tcx tib tic tii tik til tio tir tit tix tkb tkc tkk tkl tko tkr tkt tlc tli tlk tll tlo tlr tlt tlx to- tob toc toi tok tol too tor tot tox trb trc tri trk trl tro trr trt trx ttb ttc tti ttk ttl tto ttr ttt ttx txi txk txl txt xbc xbl xbr xbx xcb xci xcl xcr xcx xic xii xio xit xix xkb xkl xlb xli xlr xlt xoc xoi xok xoo xor xot xox xrc xrt xrx xtc xti xtr xtx xxi xxl xxo xxx