a-a a-b aaa aab aaj aar aau ab- aba abb abj abr abu aja ajb ajj ajr aju ar- ara arb arj arr aru au- aua aub auj aur b-u baa bab baj bar bau bba bbb bbr bbu bja bjj bjr bju bra brb brj brr bru bua bub buj bur buu jaa jab jaj jar jau jba jbj jbr jbu jja jjb jjj jjr jju jra jrb jrr jub jur ra- raa rab raj rar rau rba rbb rbr rbu rja rjr rra rrb rrr rru rua rub rur ruu ua- uaa uab uaj uar uau uba ubb ubr ubu ur- ura urb urr uru uua uur uuu