I'm sorry to answer in English but I can't write German. (30 years ago I could write German but I've forgotten.)

Using the three "lock" keys, every key on the keyboard is eight different keys. For example, with A:

<Hotkey CapsLockOff NumLockOff NumLockOff A>
<Hotkey CapsLockOff NumLockOff NumLockOn A>
<Hotkey CapsLockOff NumLockOn NumLockOff A>
<Hotkey CapsLockOff NumLockOn NumLockOn A>
<Hotkey CapsLockOn NumLockOff NumLockOff A>
<Hotkey CapsLockOn NumLockOff NumLockOn A>
<Hotkey CapsLockOn NumLockOn NumLockOff A>
<Hotkey CapsLockOn NumLockOn NumLockOn A>