#000000; background-color: #BBBBBB; font-weight: bold;">  </span> <span style="color: #000000;">│</span>    <span style="color: #000000;">│</span> <span style="color: #000000; background-color: #BBBBBB; font-weight: bold;">t </span> <span style="color: #000000;">│</span> <span style="color: #000000; background-color: #BBBBBB; font-weight: bold;">a </span> <span style="color: #000000;">│</span> <span style="color: #000000; background-color: #BBBBBB;">b </span> <span style="color: #000000;">│</span>