iiii iiis iiit iisi iist iitt iiwi isis isit issi isss isti ists itis itsi iwis iwiw s-ii siit sisi siss sist sit- siti sits sitt sitz siwi sizz ssis ssit sssi ssss ssts ssws stis stit stsi stss swis swit swiz swss swts szis szss tiit tisi tiss tist titi tits titt titz tiwi tizi tizz tsis tssi tsst tsts ttss tttt twi- twis twit twss tzzt wiii wiis wiit wiiz wiss wist wisw witi wits witt witz wiwi wizs wizz wsis wssi wsss wsst wssw wsts wstt wstw wswi wsws wswt wsww wtis wtss wtti wtts wttt wttw wtws wtwt wtww wtwz wwii wwis wwiz wwsi wwss wwst wwti wwtw wwwi wwws wwww wwwz wwzw wwzz wzst wzti wzww wzwz wzzi wzzs wzzt wzzw wzzz zisi zist ziti zits zizi zizz zsss ztst zzzs zzzz