Here is a language definition:

$$

$$

$$

$$

$$

$=$

$\{$

$$

$$

$$

is a three$-$digit string that represents a undergrad$-$level UMB course number

$\}$

L

grad

$$

$=\{$w$$w is a three$-$digit string that represents a undergrad$-$level UMB course number$\}$

You may assume that strings in the language are drawn from alphabet

$\{$

$0$

$,$

$2$

$,$

$4$

$,$

$6$

$\}$

$\{0,2,4,6\}.$