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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 get_alias(infos):
 """Get aliases of all parameters. Parameters infos : list Content of the config header file. Returns ------- pairs : list List of tuples (param alias, param name). """

    pairs = []
    for x in infos:
        for y in x:
            if "alias" in y:
                name = y["name"][0]
                alias = y["alias"][0].split(',')
                for name2 in alias:
                    pairs.append((name2.strip(), name))
    return pairs