$a=1;$b=2;$c=3;$d=4;$f=5;$g=6;$h=7;
$foo = $a? $b? $c : $d? $e : $f : $g : $h;
print $foo;
__END__
syntax error at C:\temp\ternary.pl line 2, near "$g :"
Execution of C:\temp\ternary.pl aborted due to compilation errors.