{HEAD ~ Structure} is provided for merging the fixed sized bit field and the variable sized bit field into {TAIL ~ a continuous bit field} 
{ HEAD ~ Structure } is provided for merging the fixed sized bit field and the variable sized bit field into { TAIL ~ a continuous bit field }
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL