a-a aaa aan aar aas aau aax an- ana ann anr ans anu anx ar- ara arn arr ars aru arx as- asa asn asr ass asu asx au- aua aun aur aus aux ax- axa axn axr axs axx naa nan nar nas nau nax nna nnn nns nnu nra nrn nrr nrs nru nrx nsa nsn nsr nss nsu nsx nua nun nur nus nuu nux ra- raa ran rar ras rau rax rna rnn rnr rns rnu rra rrn rrr rrs rru rsa rsn rsr rss rsu rsx rua run rur rus ruu rux rxr rxs saa san sar sas sau sax sna snn snr sns snu sr- sra srn srr srs srx ss- ssa ssn ssr sss ssu ssx sua sun sur sus suu sux sxn sxs sxu ua- uaa uan uar uas uau un- una unn unr uns unu unx ur- ura urn urr urs uru urx usa usn usr uss usu usx uua uun uur uus uuu uxr uxu xaa xan xar xas xau xna xns xnu xrx xsa xss xun xus xxx