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Shibboleths, that is, phrases in a language that are difficult for someone who is not a native speaker of that language to say might be regarded as a type of tongue-twist.[citation needed] An example is Georgian baq'aq'i ts'q'alshi q'iq'inebs ("a frog croaks in the water"), in which q' is a uvular ejective. Another example, the Czech and Slovak strč prst skrz krk ("stick a finger through the throat") is difficult for a non-native speaker due to the absence of vowels, although syllabic r is a common sound in Czech, Slovak and some other Slavic languages.