-hou bbbb bbch bcbc bcbp bccc bcpp bctc bcuc bcup bhcc bhot bhut bhuu bobb bobo bobu boch boco bocu boho boht bohu boob booc booh boop boot bopp botb both boto bott bouh boup bout bpcp bphc bpot btbp btcc btob bttb bubb bubo bubu bucc buch buco bucu buho bupc but- buto butt c-bo cbbc cbcc cbcp cbct cbcu cbot cbpc cbpp cbtc ccbc cccb cccc cccp cccu cchp ccob ccoc ccpp cctb cctc cctt ccuc ccup ccut chbp chch chcp choc choh choo chop chou chpp chto chtt chub chut cobb cobh cobo cobu coch coco cocp coct cocu coho coob cooh coop coot coph copo copp copt cotb cotc coth coto cott cotu coub coup cout cpbc cpcu cptp ctcp ctot ctpo ctpp cub- cubb cucc cupo cupp cut- cutc cuth cuto cutt hboc hbtu hcbc hccb hccc hcch hcpc hhhh hhpc hhtp hobo hoch hoho hoop hoot hopo hopp hopt hotb hoth hoto hotp hott hotu houp hout hpcc hpot hpto htcc htcp htoh htop htpc htpp http hubb hubo huch hucu huhu huot hupp huth huto hutp hutt hutu huub obbo obot obuh ocbc occc occt ocht ocpp oct- octo ohcc ohho ohob ohoh ohto ohtu ooho oooh oooo ootb ootp opo- oppo opto otho oto- otoh otoo otpp otto ottu oucc ouch ouph out- outb outh outo ouu- pbcc pboc pcbc pccc pchp pcpb pcpp phcc phht phob phoh phoo phot phut pobo poch poco pooh poop poot pop- popc popo popp popt potc poth poto pott potu poup pout ppcc pppo pppp pptt ptcc ptop pttc pubu puch pupu put- puth puto putt putu puuc tbcb tbcc tbtp tccc tccu tch- tchh tcho tchp tchu tcpo tctc thch thhp thoo thot thou thpp thtb tobo tobt tobu toch toco toho tohu tooh toot top- toph topo topp topt topu totc toth toto tott touh toup tout tpcp tppp tptp tput ttbb ttcp ttop tttt tubb tubo tubu tucc tuch tuco tuht tuhu tuph tupo tupu tuto tutt tutu tuuo ubbo uboc ubpc ucbc uccp ucho ucpb ucph ucut uhoh uhuh uhup uocc uppc uppp uppu upto upup utto uttu uucp uuoc uuuu