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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 icanhazascii(client, channel, nick, message, found):
 """ A plugin for generating showing ascii artz """

    global FLOOD_RATE, LAST_USED
    now = time.time()

    if channel in LAST_USED and (now - LAST_USED[channel]) < FLOOD_RATE:
        return

    LAST_USED[channel] = now
    return found