{HEAD ~ An intersection} between the upper surface and the first and second end surfaces form {TAIL ~ first and second cutting edges}, respectively 
form
{ HEAD ~ An intersection } between the upper surface and the first and second end surfaces form { TAIL ~ first and second cutting edges } , respectively
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH