https://www.upu.int/en/universal-postal-union/activities/philately-ircs/international-reply-coupons-ircs/?csid=34&cid=150
International Reply Coupons (IRCs)
internationalreplycouponsircs
https://www.tehrantimes.com/tag/Iranian+Red+Crescent+Society+%28IRCS%29
Iranian Red Crescent Society (IRCS) - Tehran Times
red crescenttehran timesiraniansocietyircs
https://www.merriam-webster.com/wordfinder/classic/contains/all/5/ircs/1
5-Letter Words with IRCS | Merriam-Webster
5-Letter Words Containing IRCS: circs
merriam websterletterwordsircs