Application of {TAIL ~ the SEO} to {HEAD ~ the array}, followed by a measurement of the array, yields the value of certain conditional probabilities that we wish to know 
Application of { TAIL ~ the SEO } to { HEAD ~ the array } , followed by a measurement of the array , yields the value of certain conditional probabilities that we wish to know
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH