F>CI>I>Br \mathrm {F>CI>I> Br}F>CI>I>Br
Br<F<Cl<I \mathrm { Br<F <Cl < I}Br<F<Cl<I
I>Br>Cl>I \mathrm {I>Br> Cl>I}I>Br>Cl>I
I<Br<Cl<F \mathrm { I < Br <Cl<F}I<Br<Cl<F