R and U count A. When at R, I'll count B while waiting for A to break huddle. Use 3-3-3-2. Can do it in a couple of seconds. I alway keep aware of subs coming in so I usually know how many are in the huddle before it breaks, but still get a count. I count them 2 times, at least. If I get > 11, I'll count again to be sure before flagging for illegal sub.
BJ and LJ are primary for counting B. HL will count when chain duty allows. It really depends on how good your chain crew is. More important to keep the chains straight than to conduct a 3rd count of B.
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Bayou Ump
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