{HEAD ~ Electric timer} with program carrier switchable from a short term to {TAIL ~ a long term program} 
{ HEAD ~ Electric timer } with program carrier switchable from a short term to { TAIL ~ a long term program }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL