
def seq_level(lst):
  if lst[1]-lst[0] == lst[2]-lst[1]:
    return "Linear"
  elif lst[3] - (2*lst[2]) + lst[1] == lst[2] - (2*lst[1]) + lst[0]:
    return "Quadratic"
  else:
    return "Cubic"


90c2d7d0378a3006f7f73fa605d41f40abe6a8e7
<mask token>

def seq_level(lst):
    if lst[1] - lst[0] == lst[2] - lst[1]:
        return 'Linear'
    elif lst[3] - 2 * lst[2] + lst[1] == lst[2] - 2 * lst[1] + lst[0]:
        return 'Quadratic'
    else:
        return 'Cubic'


def seq_level(lst):
  if lst[1]-lst[0] == lst[2]-lst[1]:
    return "Linear"
  elif lst[3] - (2*lst[2]) + lst[1] == lst[2] - (2*lst[1]) + lst[0]:
    return "Quadratic"
  else:
    return "Cubic"

