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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def sumMerge(dict1, dict2):
 """ Adds two dictionaries together, and merges into the first, dict1. Returns first dict. """

    for key in dict2:
        dict1[key] = list(map(lambda a,b: a + b, dict1.get(key, [0,0,0,0]), dict2[key]))
    return dict1