Subtract Square Duotone icon

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" width="24" height="24"><g fill="currentColor"><path d="M216 96v120H96v-56h64V96Z" opacity=".2"/><path d="M216 88h-48V40a8 8 0 0 0-8-8H40a8 8 0 0 0-8 8v120a8 8 0 0 0 8 8h48v48a8 8 0 0 0 8 8h120a8 8 0 0 0 8-8V96a8 8 0 0 0-8-8ZM48 48h104v104H48Zm160 160H104v-40h56a8 8 0 0 0 8-8v-56h40Z"/></g></svg>