$D->TL$
$T->int|real$
$L->id R$
$R->,id R|\varepsilon$

$first(D) = first(T) = \{int,real \}$
$first(T) = \{int,real \}$
$first(L) = \{id\}$
$first(R) = \{，,\varepsilon\}$
$first(TL) = first(T) = \{int,real\}$
$first(int) = \{int\}$
$first(real) = \{real\}$
$first(id R) = \{id\}$
$first(,id R) = \{,\}$

$follow(D) = \{\$}$ $follow(T) = {id}$ $follow(L) = {\$}$ $follow(R) = {\$}$