Which of the following is a sentence of TFL strictly speaking $[$i$.$e$.$ not allowing for relaxed bracketing conventions$]$:

$($A$)$

P $$ Q

$$S

$(53)$

$$P

$($M $$ F$)$

$($A $->($A $$F$))($D $$ E$)$

$(($F $$D $->$ J$)($C $$ D$))$

$(($Z $$ S $)->$ W$)($J $$ X$)$