a = <span class="hljs-number">'hff</span>; A = <span class="hljs-number">'HFF</span>; b = <span class="hljs-number">8'h33</span>; B = <span class="hljs-number">8'H33</span>; c = <span class="hljs-number">12</span>; d = <span class="hljs-number">'o755</span>; e = <span class="hljs-number">8'b1001_0001</span>; f = <span class="hljs-number">8'b1111zzzx</span>;