def merge_dictionaries_three(dict1,dict2, dict3):
    import collections as ct
    
    merged_dict = dict(ct.ChainMap({},dict1,dict2,dict3))
    return merged_dict
def merge_dictionaries_three(dict1, dict2, dict3):
    import collections as ct
   
    kKK102I566Q = dict(ct.ChainMap({}, dict1, dict2, dict3))
    return kKK102I566Q