based on the code: public static void main$($String$[]$ args$)$

$\{$

ST st;

st $=$ new ST$()$;

for $($int i $=0$; $!$StdIn.isEmpty$()$; i$++)$

$\{$

String key $=$ StdIn.readString$()$;

st$.$put$($key$,$ i$)$;

$\}$

for $($String s : st$.$keys$())$

StdOut.println$($s $+""+$ st$.$get$($s$))$;

$\}$Suppose the input to the test client program what value would be returned by the call: rank

$("$

F

$")$