def METHOD_NAME(csc, endcap, station, ring, chamber): 
  if csc != "CSC": return False
  # skip the duplicated ME1/a
  if station==1 and ring==4: return False
  # skip non-instrumented ME4/2's:
  if station==4 and ring==2 and ( (endcap==1 and (chamber<9 or chamber >13)) or endcap==2 ) : return False
  #if ring!=1: return False
  return True