costes ocstes csotes scotes osctes soctes cotses octses ctoses tcoses otcses tocses cstoes sctoes ctsoes tcsoes stcoes tscoes ostces sotces otsces tosces stoces tsoces cosets ocsets csoets scoets oscets socets coests ocests ceosts ecosts oecsts eocsts cseots sceots cesots ecsots secots escots osects soects oescts eoscts seocts esocts cotess octess ctoess tcoess otcess tocess coetss ocetss ceotss ecotss oectss eoctss cteoss tceoss cetoss ectoss tecoss etcoss otecss toecss oetcss eotcss teocss etocss csteos scteos ctseos tcseos stceos tsceos csetos scetos cestos ecstos sectos esctos ctesos tcesos cetsos ectsos tecsos etcsos stecos tsecos setcos estcos tescos etscos ostecs sotecs otsecs tosecs stoecs tsoecs osetcs soetcs oestcs eostcs seotcs esotcs otescs toescs oetscs eotscs teoscs etoscs steocs tseocs setocs estocs tesocs etsocs costse ocstse csotse scotse osctse soctse cotsse octsse ctosse tcosse otcsse tocsse cstose sctose ctsose tcsose stcose tscose ostcse sotcse otscse toscse stocse tsocse cosste ocsste csoste scoste oscste socste cosste ocsste csoste scoste oscste socste cssote scsote cssote scsote sscote sscote osscte soscte osscte soscte ssocte ssocte cotsse octsse ctosse tcosse otcsse tocsse costse ocstse csotse scotse osctse soctse ctsose tcsose cstose sctose tscose stcose otscse toscse ostcse sotcse tsocse stocse cstsoe sctsoe ctssoe tcssoe stcsoe tscsoe csstoe scstoe csstoe scstoe ssctoe ssctoe ctssoe tcssoe cstsoe sctsoe tscsoe stcsoe stscoe tsscoe sstcoe sstcoe tsscoe stscoe ostsce sotsce otssce tossce stosce tsosce osstce sostce osstce sostce ssotce ssotce otssce tossce ostsce sotsce tsosce stosce stsoce tssoce sstoce sstoce tssoce stsoce cosest ocsest csoest scoest oscest socest coesst ocesst ceosst ecosst oecsst eocsst cseost sceost cesost ecsost secost escost osecst soecst oescst eoscst seocst esocst cosset ocsset csoset scoset oscset socset cosset ocsset csoset scoset oscset socset cssoet scsoet cssoet scsoet sscoet sscoet osscet soscet osscet soscet ssocet ssocet coesst ocesst ceosst ecosst oecsst eocsst cosest ocsest csoest scoest oscest socest cesost ecsost cseost sceost escost secost oescst eoscst osecst soecst esocst seocst csesot scesot cessot ecssot secsot escsot csseot scseot csseot scseot ssceot ssceot cessot ecssot csesot scesot escsot secsot sescot esscot ssecot ssecot esscot sescot osesct soesct oessct eossct seosct esosct ossect sosect ossect sosect ssoect ssoect oessct eossct osesct soesct esosct seosct sesoct essoct sseoct sseoct essoct sesoct cotess octess ctoess tcoess otcess tocess coetss ocetss ceotss ecotss oectss eoctss cteoss tceoss cetoss ectoss tecoss etcoss otecss toecss oetcss eotcss teocss etocss cotses octses ctoses tcoses otcses tocses costes ocstes csotes scotes osctes soctes ctsoes tcsoes cstoes sctoes tscoes stcoes otsces tosces ostces sotces tsoces stoces coests ocests ceosts ecosts oecsts eocsts cosets ocsets csoets scoets oscets socets cesots ecsots cseots sceots escots secots oescts eoscts osects soects esocts seocts ctesos tcesos cetsos ectsos tecsos etcsos ctseos tcseos csteos scteos tsceos stceos cestos ecstos csetos scetos esctos sectos tescos etscos tsecos stecos estcos setcos otescs toescs oetscs eotscs teoscs etoscs otsecs tosecs ostecs sotecs tsoecs stoecs oestcs eostcs osetcs soetcs esotcs seotcs tesocs etsocs tseocs steocs estocs setocs csteso scteso ctseso tcseso stceso tsceso csetso scetso cestso ecstso sectso esctso ctesso tcesso cetsso ectsso tecsso etcsso stecso tsecso setcso estcso tescso etscso cstseo sctseo ctsseo tcsseo stcseo tscseo cssteo scsteo cssteo scsteo sscteo sscteo ctsseo tcsseo cstseo sctseo tscseo stcseo stsceo tssceo sstceo sstceo tssceo stsceo csesto scesto cessto ecssto secsto escsto csseto scseto csseto scseto ssceto ssceto cessto ecssto csesto scesto escsto secsto sescto esscto ssecto ssecto esscto sescto ctesso tcesso cetsso ectsso tecsso etcsso ctseso tcseso csteso scteso tsceso stceso cestso ecstso csetso scetso esctso sectso tescso etscso tsecso stecso estcso setcso stesco tsesco setsco estsco tessco etssco stseco tsseco ssteco ssteco tsseco stseco sestco esstco ssetco ssetco esstco sestco tessco etssco tsesco stesco estsco setsco ostesc sotesc otsesc tosesc stoesc tsoesc osetsc soetsc oestsc eostsc seotsc esotsc otessc toessc oetssc eotssc teossc etossc steosc tseosc setosc estosc tesosc etsosc ostsec sotsec otssec tossec stosec tsosec osstec sostec osstec sostec ssotec ssotec otssec tossec ostsec sotsec tsosec stosec stsoec tssoec sstoec sstoec tssoec stsoec osestc soestc oesstc eosstc seostc esostc ossetc sosetc ossetc sosetc ssoetc ssoetc oesstc eosstc osestc soestc esostc seostc sesotc essotc sseotc sseotc essotc sesotc otessc toessc oetssc eotssc teossc etossc otsesc tosesc ostesc sotesc tsoesc stoesc oestsc eostsc osetsc soetsc esotsc seotsc tesosc etsosc tseosc steosc estosc setosc stesoc tsesoc setsoc estsoc tessoc etssoc stseoc tsseoc ssteoc ssteoc tsseoc stseoc sestoc esstoc ssetoc ssetoc esstoc sestoc tessoc etssoc tsesoc stesoc estsoc setsoc
Note: these 'words' (valid or invalid) are all the permutations of the word costes. These words are obtained by scrambling the letters in costes.