{HEAD ~ The bars} and spaces are arranged in a plurality of sequential groups defining respective characters of {TAIL ~ equal width} 
{ HEAD ~ The bars } and spaces are arranged in a plurality of sequential groups defining respective characters of { TAIL ~ equal width }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL