-ic -ol bbb bbc bbi bbl bbn bbo bbs bbt bcb bcc bci bcl bcn bco bcs bct bi- bib bic bii bil bin bio bis bit blb blc bli bll bln blo bls blt bnb bnc bni bnl bnn bno bns bnt bob boc boi bol bon boo bos bot bsb bsc bsi bsl bsn bso bss bst btb btc bti btl btn bto bts btt c-- cbb cbc cbi cbl cbn cbo cbs cbt ccb ccc cci ccl ccn cco ccs cct ci- cib cic cii cil cin cio cis cit cl- clb clc cli cll cln clo cls clt cn- cnb cnc cni cnl cnn cno cns cnt co- cob coc coi col con coo cos cot csb csc csi csl csn cso css cst ctb ctc cti ctl ctn cto cts ctt ibb ibc ibi ibl ibn ibo ibs ibt icb icc ici icl icn ico ics ict iib iic iii iil iin iio iis iit il- ilb ilc ili ill iln ilo ils ilt in- inb inc ini inl inn ino ins int io- iob ioc ioi iol ion ioo ios iot is- isb isc isi isl isn iso iss ist itb itc iti itl itn ito its itt lbb lbc lbi lbl lbo lbs lbt lcb lcc lci lcl lcn lco lcs lct lib lic lii lil lin lio lis lit llb llc lli lll lln llo lls llt lnb lnc lni lnl lnn lno lns lnt lob loc loi lol lon loo los lot lsb lsc lsi lsl lsn lso lss lst ltb ltc lti ltl lto lts ltt n-i nbb nbc nbi nbl nbn nbo nbs nbt ncb ncc nci ncl ncn nco ncs nct nib nic nii nil nin nio nis nit nlb nlc nli nll nln nlo nls nlt nnb nnc nni nnl nnn nno nns nnt no- nob noc noi nol non noo nos not nsb nsc nsi nsl nsn nso nss nst ntb ntc nti ntn nto nts ntt o-i ob- obb obc obi obl obn obo obs obt oc- ocb occ oci ocl ocn oco ocs oct oib oic oii oil oin oio ois oit olb olc oli oll oln olo ols olt on- onb onc oni onl onn ono ons ont oo- oob ooc ooi ool oon ooo oos oot os- osb osc osi osl osn oso oss ost ot- otb otc oti otl otn oto ots ott sbb sbc sbi sbl sbn sbo sbs sbt scb scc sci scl scn sco scs sct sib sic sii sil sin sio sis sit slb slc sli sll sln slo sls slt snb snc sni snl snn sno sns snt sob soc soi sol son soo sos sot ss- ssb ssc ssi ssl ssn sso sss sst stb stc sti stl stn sto sts stt tbb tbc tbi tbl tbn tbo tbs tbt tcb tcc tci tcl tcn tco tcs tct tib tic tii til tin tio tis tit tlc tli tll tln tlo tls tlt tnb tnc tni tnl tnn tno tns tnt to- tob toc toi tol ton too tos tot tsb tsc tsi tsl tsn tso tss tst ttb ttc tti ttl ttn tto tts ttt