-er -th bbb bbe bbh bbn bbo bbr bbt bbx be- beb bee beh ben beo ber bet bex bhb bhe bhh bho bhr bht bhx bnb bne bnn bno bnr bnt bnx bob boe boh bon boo bor bot box brb bre brh brn bro brr brt brx btb bte bth btn bto btr btt btx bxb bxn bxo bxx ebb ebe ebh ebn ebo ebr ebt ebx eeb eee een eeo eer eet eex ehb ehe ehh ehn eho ehr eht en- enb ene enh enn eno enr ent eo- eob eoe eoh eon eoo eor eot erb ere erh ern ero err ert etb ete eth etn eto etr ett etx ex- exe exh exo exr ext exx hbb hbe hbh hbn hbo hbr hbt hbx he- heb hee heh hen heo her het hex hhb hhe hhh hhn hho hhr hht hnb hne hnh hnn hno hnt hob hoe hoh hon hoo hor hot hox hr- hrb hre hrh hrn hro hrr hrt htb hte hth htn hto htr htt htx nbb nbe nbn nbo nbr nbt nbx ne- neb nee neh nen neo ner net nex nhb nhe nhh nhn nhr nht nnb nne nnh nnn nno nnt no- nob noe noh non noo nor not nox nrb nre nrn nro nrr nrt nrx ntb nte nth ntn nto ntr ntt ntx nxt ob- obb obe obh obn obo obr obt obx oeb oee oeh oen oeo oer oet oex ohe ohh ohn oho ohr oht on- onb one onh onn ono onr ont onx oo- oob ooh oon ooo oor oot oox or- orb ore orh orn oro orr ort orx ot- otb ote oth otn oto otr ott ox- oxb oxn oxo oxt oxx rbb rbe rbh rbn rbo rbr rbt rbx re- reb ree reh ren reo rer ret rex rh- rhb rhe rhh rhn rho rhr rht rnb rnh rnn rno rnr rnt rob roe roh ron roo ror rot rox rrb rrh rrn rrr rrt rtb rte rtn rto rtr rtt rtx rxr t-x tbb tbe tbh tbn tbo tbr tbt te- teb tee teh ten teo ter tet tex th- thb the thh thn tho thr tht thx tnb tne tnh tnn tno tnr tnt tnx to- tob toe toh ton too tor tot tox trb tre trh trn tro trr trt trx ttb tte tth ttn tto ttr ttt ttx txe txn txt xbe xbr xbx xee xen xer xet xex xht xno xon xoo xor xot xox xrt xrx xtr xtx xxo xxx