-ji bbb bbi bbo bbr bi- bib bii bij bio bir bji bjj bjr bob boi boj boo bor brb bri brj bro brr ibb ibi ibj ibo ibr iib iii iij iio iir ijb iji ijo io- iob ioi ioj ioo ior ir- irb iri irj iro irr j-i jbi jbj jbo jbr jib jii jij jio jir jjb jjj jjr job joi joj joo jor jrb jri jro jrr o-i ob- obb obi obj obo obr oib oii oio oir ojb oji ojo oo- oob ooi ooo oor or- orb ori oro orr rbb rbi rbo rbr rib rii rio rir rjr rob roi roj roo ror rrb rri rrr