In the keys of udev rules, you may use shell-style pattern matching, known as wild cards. For example, the character * can be used as a placeholder for any characters or ? can be used for precisely one arbitrary character.

KERNEL="ts*", NAME="input/%k"

This rule assigns the standard kernel name in the standard directory to a device whose designation begins with the letters "ts". Find detailed information about the use of regular expressions in udev rules in the man page man udev.