from a set of elements, find out if any 4 of the elements are consecutive numbers

def consec(elems):
  for i in range(len(elems) - 3):
      if elems[i] + 1 == elems[i+1] and elems[i] + 2 == elems[i+2] and elems[i] + 3 == elems[i+3]:
          return True
  return False