orr orx ox- oxa oxc oxf oxi oxn oxo oxx ra- raa rac rae raf rag rah rai ran rao rar rax rca rcc rce rcf rcg rch rci rcn rco rcr rcx re- rea rec ree ref reg reh rei ren reo rer rex rfa rfc rfe rff rfg rfh rfi rfn rfo rfr rga rgc rge rgf rgg rgh rgi rgn rgo rgr rgx rh- rha rhc rhe rhf rhg rhh rhi rhn rho rhr ria ric rie rif rig rih rii rin rio rir rix rna rnc rng rnh rni rnn rno rnr roa roc roe rof rog roh roi ron roo ror rox rra rrc rrf rrg rrh rri rrn rrr rxr xaa xac xaf xag xan xar xcf xch xci xcr xcx xee xeg xen xer xex xfa xfe xfh xfn xfx xge xgi xia xic xie xii xin xio xix xna xnc xno xoa xoc xof xog xoi xon xoo xor xox xrc xrf xrx xxi xxo xxx