-er bbb bbe bbg bbi bbn bbo bbr bbx be- beb bee beg bei ben beo ber bex bgb bge bgg bgi bgn bgo bgr bgx bi- bib bie big bii bin bio bir bix bnb bne bng bni bnn bno bnr bnx bob boe bog boi bon boo bor box brb bre brg bri brn bro brr brx bxb bxi bxn bxo bxx ebb ebe ebg ebi ebn ebo ebr ebx eeb eee eeg een eeo eer eex egb ege egg egi egn ego egr egx eib eie eig eii ein eio eir eix en- enb ene eng eni enn eno enr eo- eob eoe eog eoi eon eoo eor erb ere erg eri ern ero err ex- exe exi exo exr exx gbe gbg gbi gbn gbo gbr gbx ge- geb gee geg gei gen geo ger gex ggb ggg ggi ggn ggo ggr gib gie gig gii gin gio gir gnb gne gni gnn gno gnr gob goe gog goi gon goo gor gox grb gre grg gri grn gro grr grx ibb ibe ibg ibi ibn ibo ibr ibx ie- iee ieg iei ien ier iex igb ige igg igi ign igo igr iib iie iii iin iio iir iix in- inb ine ing ini inn ino inr inx io- iob ioe iog ioi ion ioo ior ir- irb ire irg iri irn iro irr irx ixe ixi ixn n-i nbb nbe nbg nbi nbn nbo nbr nbx ne- neb nee neg nei nen neo ner nex ngb nge ngg ngi ngn ngo nib nie nig nii nin nio nir nix nnb nne nng nni nnn nno no- nob noe nog noi non noo nor nox nrb nre nrg nri nrn nro nrr nrx o-i ob- obb obe obg obi obn obo obr obx oeb oee oeg oei oen oeo oer oex oge ogg ogi ogn ogo ogx oib oie oii oin oio oir on- onb one ong oni onn ono onr onx oo- oob oog ooi oon ooo oor oox or- orb ore org ori orn oro orr orx ox- oxb oxi oxn oxo oxx rbb rbe rbg rbi rbn rbo rbr rbx re- reb ree reg rei ren reo rer rex rgb rge rgg rgi rgn rgo rgr rgx rib rie rig rii rin rio rir rix rnb rng rni rnn rno rnr rob roe rog roi ron roo ror rox rrb rrg rri rrn rrr rxr xbe xbr xbx xee xeg xen xer xex xge xgi xie xii xin xio xix xno xog xoi xon xoo xor xox xrx xxi xxo xxx