The apparatus 1, wherein the apparatus comprises {HEAD ~ a calculator} which performs {TAIL ~ calculations} during the normal mode 
The apparatus 1 , wherein the apparatus comprises { HEAD ~ a calculator } which performs { TAIL ~ calculations } during the normal mode
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH