ch::String->String
ch c 
    | c == "a" = "vowel"
    | c == "i" = "vowel"
    | c == "u" = "vowel"
    | c == "e" = "vowel"
    | c == "o" = "vowel"
    | otherwise = "consonant"

main::IO ()
main = do
    s <- getLine
    putStrLn $ ch s