Master Password Backup

99% of my passwords are stored in a password manager. To encrypt the vault I obviously need a master password, which I memorized and practice regularly to not forget it. But maybe I could forget my master password. So I need to backup it somehow. I don’t want to have a single piece of paper where the master password is just written down, because if someone finds this, he could directly decrypt my .kdbx file and read all my passwords. So I did some research and decided to make a Shamir Secret Sharing. But the problem is that I can’t find a tool where I can put in my master password and get out multiple shares of words. All the tools I found, either only accept Hex values, or make undesirable (for my purpose) outputs, like QR codes or Hex values. I just want to enter words and get words back that I them can write done on multiple papers. Does someone have a solution? How do you backup your master passwords?