cccc ccoc cctc cctt chch chkt choc choh chok choo chto chtt ckch ckck ckco ckoc ckoo ckot coch cock coco coct coho cok- coko cooh cook coot cotc coth coto cott ctot hccc hcch hhhh hkcc hoch hock hoho hoko hook hoot hoth hoto hott htcc htoh kccc kcck kcct kchh kchk kcho kckc kckk kcko kcoh kcot kctc kcto khcc khch khck khct khhk khho khkk khoc khok khot khth khtk khto khtt kkch kkck kkco kkct kkhh kkhk kkkk kkoh kkoo kkot kktc kktk koch kock koct kohh koho koht kokc kokh kokk koko kooc kook kooo koot kotc koth kotk koto kott ktcc ktch ktck ktco kthc kthh kthk ktho ktht ktkc ktkk ktko ktkt ktoc ktoh ktok ktoo ktot kttc ktth kttk ktto kttt occc occt ocht oct- octo ohcc ohho ohoh ohok ohto okko okok okot okto ooho oooh oooo otho oto- otoh otok otoo otto tccc tch- tchh tcho tctc thch thoo thot toch tock toco toho toko tooh took toot totc toth toto tott tttt