{HEAD ~ The PS matrix} 603 and PMMA spots 605 are registered at {TAIL ~ the substrate}; spheres 609 are not 
registered at
{ HEAD ~ The PS matrix } 603 and PMMA spots 605 are registered at { TAIL ~ the substrate } ; spheres 609 are not
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH