STOPWATCH

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acts apos atop caph capo caps cash cast cats caws chao chap chat chaw chop chow coat cops cosh cost cots cows haps hasp hast hats haws hops host hots hows oast oath oats ocas opah opts pacs pact pash past path pats paws phat phot posh post pots pows scat scop scot scow shat shaw shop shot show shwa soap soca soph soth spat spot stat staw stoa stop stot stow swap swat swop swot tach taco tact taos taps tats taws that thaw toph tops tosh tost tots tows twas twat twos waps wash wasp wast wats watt whap what whoa whop wops wost wots