7. Convert the following TM to an unrestricted computational grammar.
$a/a, \rightarrow$
$Y/Y, \rightarrow$
$b/b, \rightarrow$
$Z/Z, \rightarrow$
$a/X, \rightarrow$
$b/Y, \rightarrow$
$c/Z, \leftarrow$
$a/a, \leftarrow$
$b/b, \leftarrow$
$Y/Y, \leftarrow$
$Z/Z, \leftarrow$
$X/X, \rightarrow$
$Y/Y, \rightarrow$
$\square / \square, \leftarrow$
$Y/Y, \rightarrow$
$Z/Z, \rightarrow$