{HEAD ~ The barcode} has {TAIL ~ I first columns} of modules and J rows of modules transverse to columns 
has
{ HEAD ~ The barcode } has { TAIL ~ I first columns } of modules and J rows of modules transverse to columns
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH