AZERTYQW   => no changes
AZERTYQW


AZERTYQW   => example azerty->qwerty
QWERTYAZ


replace the 2 first line as wanted :
ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890   => initial keys
ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890   => new keys (change as you suits)


