Difference('Mayer', 'Meyer') = 4
Difference('Mayer', 'Meiker') = 3 ('M600', 'M260')
Difference('Mayer', 'Meister') = 2 ('M600', 'M236')
Difference('Mayer', 'Meisterei') = 2 ('M600', 'M236')
Difference('Meister', 'Kleister') = 2 ('M236', 'K423')
Difference('Mayer', 'Kleister') = 0 ('M600', 'K423')