def response(returnvars, returnvals):
    """Create a dictionary combining keys with corresponding values.
    parameters:
        returnvars - keys to use in the output (required)
        returnvals - values for the keys in the output (required)
    returns:
        response - a dictionary of combined keys and values
    """
    response = {}
    i=0

    for a in returnvars:
        response[a]= returnvals[i] 
        i+=1

    return response