$AE = [Ä {A \u0308}];
$OE = [Ö {O \u0308}];
$UE = [Ü {U \u0308}];
[ä {a \u0308}] > ae;
[ö {o \u0308}] > oe;
[ü {u \u0308}] > ue;
$AE } [:Lowercase:] > Ae;
$OE } [:Lowercase:] > Oe;
$UE } [:Lowercase:] > Ue;
$AE > AE;
$OE > OE;
$UE > UE;
::Latin-ASCII;