<svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" viewBox="0 0 15 15">
    <defs>
        <style>
            .cls-1 {
            fill: #555d66;
            }
        </style>
    </defs>
    <rect id="BR" class="cls-1" y="6" width="7" height="9"/>
    <rect id="BL" class="cls-1" x="8" y="10" width="7" height="5"/>
    <rect id="TR" class="cls-1" width="7" height="5"/>
    <rect id="TL" class="cls-1" x="8" width="7" height="9"/>
</svg>