edit: Make 0 a special rune for invalid key
edit: Make 0 a special rune for invalid key

ke7ofi/elvish,elves/elvish,beni55/elvish,ke7ofi/elvish,beni55/elvish,CodyGuo/elvish,elves/elvish,elves/elvish,CodyGuo/elvish,elves/elvish,elves/elvish