bbbb bbrg bibb bibi bigb bigg bigt birb birg biri birk birr birt bitt brig brik brit brkb brrr btrt bttb ggbt gggg gibb gigg gigi girg giri girk girr girt grbr grib grig grit grrr gtbr ibri ibtb igri iiii iiit iitr iitt ikig ikki ikri iri- irig irki irri irti itri kbbb kbbg kbbi kbbk kbbr kbbt kbgb kbgg kbgr kbgt kbib kbig kbik kbit kbkb kbkg kbkk kbkr kbrb kbrg kbri kbrk kbrt kbtb kbtk kbtr kbtt kgbb kgbr kgbt kggg kggi kggr kgir kgrb kgrg kgri kgrk kgrr kgrt kgtk kibb kibg kibi kibr kibt kiii kiik kiit kiki kikk kikr kikt kirb kiri kirk kirr kirt kitg kiti kitr kitt kkbb kkbg kkbi kkbr kkbt kkgb kkgr kkik kkit kkkk kkrb kkrk kkrr kkrt kktk krbb krbg krbi krbk krbr krbt krgi krgt krib krik krit krki krkk krkr krrb krrg krri krrk krrr krrt krti krtk krtr ktbb ktbg ktbr ktbt ktgg ktgr ktib ktig ktik ktkb ktkk ktkr ktkt ktrb ktrg ktri ktrk ktrr ktrt kttg ktti kttk kttr kttt rbbb rbbr rgbi rgit rgtr rib- rigg rigi riki rikk riri riti ritt rrrr rtkg tbit tbrb tibi tigi tigr tiit tiki tirb tiri tirr titi titt tkkg tri- trib trig trik trit trtr ttbb ttkg tttt