a-a a-b a-i aaa aab aai aar aaw ab- aba abb abi abr abw ai- aia aib aii air aiw ar- ara arb ari arr arw aw- awa awb awi awr aww baa bab bai bar baw bba bbb bbi bbr bbw bi- bia bib bii bir biw bra brb bri brr brw bwa bwb bwi bwr ia- iaa iab iai iar iaw iba ibb ibi ibr ibw iia iib iii iir iiw ir- ira irb iri irr iwa iwb iwi iwr iww ra- raa rab rai rar raw rba rbb rbi rbr rbw ria rib rii rir rra rrb rri rrr rwa rwb rwi rwr waa wab wai war waw wba wbb wbi wbr wbw wia wib wii wir wr- wra wri wrr wrw wwa wwi www