retrieve, # specify sea surface temperature for some steps beyond the standard 7 months
class  = od,
date   = 2018-11-01,
expver = 1,
levtype= sfc,
method = 3,
number = 0/1/2/3/4/5/6/7/8/9/10/11/12/13/14,
origin = ecmf,
param  = 34.128,
step   = 5172/5184/5196/5208/5220/5232/5244/5256/5268,
stream = mmsf,
system = 5,
time   = 00,
type   = fc,
target = "output"