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We need to retrieve three types of files efficiently for the two reanalyses with experiment id = 21 and experiment id = 22. The three retrievals all have class=ea, but have the following "stream" and "type" combinations:
- Atmospheric daily analyses (stream=oper, type=an)
- Monthly means of Daily Means (stream=moda, type=an)
- Observation departures for the data used in the reanalyses (stream=oper, type=mfb)
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