bbbb bibb bibi birb biri birr birt biry bitt bmir bmmi brim brit brrm brrr bry- btrt btry bttb byit byrt i-by ibbm ibim ibri ibtb ibyi iiii iiit iitm iitr iitt imbi imir imit immi immt immy imri imrr irbm irby iri- iriy irri irti itby itim itri itry itty itym mbim miii miit mim- mimi mimy miri mirr mirt miry mit- mitb miti mitm mitt mity mmii mmmm mmyy mrbb mrbm mrtm mrtt mtrr mttr mybb mybi myi- myir myit mymy myrr myrt myry rbbb rbbr rib- riby rimi rimm rimy riri riti ritt rrrr rtmi ryim rytt ryyt tbit tbrb tibi tiit timi timm tirb tiri tirr tiry titi titt tiyi tmbr tmtt tri- trib trim trit trmb trmi trtr try- tryb trym ttbb ttim tttt tybi tyir tyr- tyrr tyti tytt tyty ybry yirb yirm yirr yiti ymir yyyy