cccc cccs ccoc ccss ccst cctc cctt coco coct coos coot cosc coso coss cost cosy cotc coto cots cott coty coyo coys coyt cozy cozz cscc csco cscs csos csot cstc csto csts csys ctos ctot ctsc ctss ctts cyc- cycc cycs cyst cyt- cyto cyy- cyyc czts czyz occc occt ocos oct- octo octs octy ocys oooo ooos oost oots ooty oozy oscc osco osoo osos osso ossy ostc osts osyt oto- otoo otos otoy otso otto otts oyss oyst ozzy s-os sccc sccs scct sccy scoo scot scsc scso scst sctc scto scts soco socs socy soos soot sooy soso soss sost sotc soto sots soyo soys soyt soz- sscc sscs ssoc ssot sssc ssss sstc ssts stcc stcs stoo stos stot stoy stss sttc stys syco syso syss syst sytt szoc szot szss tccc tcos tctc tcts to-y toco toos toot tosc toso toss tost tosy totc toto tots tott toty toyo toys toyt toyz tozo tozy tscc tsos tsoy tsst tstc tsts tsys ttoy ttss tttt ttys tyco tyss tyst tyto tytt tyty tzzt yccc yctc yoot yooz yoso yost yott yoyo yozo ysco yyyy zoco zoo- zoos zoot zoso zoss zots zott zoty zotz zozo zsss ztst zzzs zzzz