absence of vowels, although syllabic r is a common sound in Czech, Slovak and some other Slavic languages. Finger-fumblers The sign language equivalent of a tongue twister is called a finger-fumbler'''. According to Susan Fischer, the phrase Good blood, bad blood is a tongue twister in English as well as a finger-fumbler in ASL. One-syllable article One-syllable article is a form of Mandarin Chinese tongue twister, written in Classical Chinese. Due to Mandarin Chinese having only four tonal ranges (compared to nine in Cantonese, for example), these works sound like a work of one syllable in different tonal range when spoken in Mandarin, but are far more comprehensible when spoken in another dialect. In popular culture In 1951 Danny Kaye recorded a Sylvia Fine song titled "Tongue Twisters". The children's books by Dr. Seuss contain a significant number of tongue twisters, with Oh Say Can You Say?, and Fox in Socks being the most extreme cases. In the 1952 film Singin' in the Rain, movie star Don Lockwood (Gene Kelly) uses tongue twisters, such as Peter Piper, while learning proper diction so he can make the transition from silent films to "talkies" in 1920s Hollywood. He also turns one of them ("Moses supposes his toeses are roses") into a song and dance number along with his best friend Cosmo Brown (Donald O'Connor). In 1968, Jack Webb guested on The Tonight Show Starring Johnny Carson and took part in a parody of Dragnet. The premise was Webb (as Sgt. Joe Friday) grilling Carson about "kleptomaniac Claude Cooper from Cleveland, who copped clean copper clappers kept in a closet." The sketch was regularly shown on anniversary specials. In the episode "You Said a Mouseful" from Pinky and the Brain'', both Pinky and Brain go through a collage of tongue twisters that cover almost every category possible. The TV series BoJack Horseman contains increasingly convoluted tongue twisters as the show progresses. The lines are often delivered by Princess Carolyn, and a notable set involves the actress 'Courtney Portnoy', for example: "How would you enjoy joining Portnoy for a scorched soy porterhouse pork four-courser at Koi?" followed by "Glorify your source, but don't make it feel forced, of course. And try the borscht!" Many examples of tongue twisters be found in hip hop music. A commonly used tongue twister is "Peter Piper", as seen in the 1986 Run-D.M.C. song "Peter Piper". See also Alliteration