icu4c/source/data/coll/de_AT.txt

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html#License
de_AT{
    Version{"37"}
    collations{
        phonebook{
            Sequence{
                "&a<ä<<<Ä"
                "&o<ö<<<Ö"
                "&u<ü<<<Ü"
                "&ss<ß<<<ẞ"
            }
            Version{"37"}
        }
    }
}