The method 13, wherein {HEAD ~ said Unet sequence} of operations comprises {TAIL ~ a sequence} of elementary operations on qubits 
The method 13 , wherein { HEAD ~ said Unet sequence } of operations comprises { TAIL ~ a sequence } of elementary operations on qubits
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH