CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "tools.ietf.org",cType: 'managed',cRay: '927937e5ef43fd33',cH: 'WY27MmG7uDvzperonnBqIoG2EUb0XshNgi3k36yuO2g-1743186832-1.2.1.1-gEubwJX8tO2b_1X.3VWG.1VnYrcDciZS4rmWq.Ournt4zTHMqNepStbCmdLUeKOE',cUPMDTk: "\/html\/rfc8252?__cf_chl_tk=PYYCrQ_aFAvUhlLc7UWU8IJ2Zhbf1d67djusafGGai4-1743186832-1.0.1.1-Mn70rP9ewEbaL7fRktPLRnem5kbhNPi_Gc8TY26ACBg",cFPWv: 'b',cITimeS: '1743186832',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/html\/rfc8252?__cf_chl_f_tk=PYYCrQ_aFAvUhlLc7UWU8IJ2Zhbf1d67djusafGGai4-1743186832-1.0.1.1-Mn70rP9ewEbaL7fRktPLRnem5kbhNPi_Gc8TY26ACBg",md: "V_pMCnKCmwq1sOFPGDCDeDO70a.dqjgkxPxdlCKkpRA-1743186832-1.2.1.1-MREfUEjhumrloNUWn8M0.CiGUQzNge3QO6FLTD4q1TL689efW43Ar7h4ocbzl.V2vzfNk3VcP37ZfwaXtYdR0qMS8eYnX00f7lu2bOYKgjsSdJcASViDnJeDCXSifvRCFIA.GTKaFTlmvNCehwaKGDWimc2QA.KsSLIhtL08pks4J8tXV.1WrxE28cM1Py7GpjMB1SULp1RgVCj97Y6JQ3BBYv.NtvB88xtuZabUqQRqqc7Gatrjup_fzAQpj7RX43MAb7EvGdgCeK3_q4LLCrl5SgTn4_Hyq3IMgFGcO7LQIwhjDG1UwWRcaiPQiAlZXdAeI01EBXZi68UffcZt8PhmRvdHCP6Fyeen8qbNB44uVEumvLzRsKryJzlxc2Jw7QI.ybGdyA5_kgSBE7R24xs1U4U5uSsEy4ScFVAksO1zUZH2SFZ4Rtp8a_OUIvrZKZPQLIAGvHUBj82YJ5PSNKZGFMm25335fB588mO6mcys1r54u_4CRSANxA9bgwYGdO2RJ8NZs8Bze07PPXObMTxyIPadlWpDoJgZeKiyPJniIejGss3lLjTGHlnf0KD9T36g5E3FTGOS0JZHTFo1ZAiFvxzQ5PTpd4iK5_s202S.YZhjfnZ.3QM0Ld8onTMug28zfYHstokum.34SSQQ1yDwj..J8djVhIsjDxdhavbBj0ph2m3H2EL0PiYP.7QEMN09FoCv2OeFrAhv9391tFrUKAUKV6Pfj9NNqqXUtgYYefmiXXip5O2CsNmBLb.RY0s_sLybT7rhicvBs4vh7SOtqcmHFzvDr8kIy8MiTW.E0F8S5YSxmzBE9ww0cuVo7y99eyZhEYDSgOk8No9LNvir1wJLn8sayB_J0JJSSSlGNuspH5FR0GtLqFuxgOCNSIkYQkxTeRZnJIMx4qlur2XNrLlvN4TqbzJe_QwyEkcnkTDTDuKYa0knbajmqdHaJM_k5qnen1.BPwN8JIy304yO0CcgnZAl8t7Llr.mo6q5YOmedx10c7NsZmDcAkyKIQyTt9zSuF1ArHBfIPf89kk5IF9y.SrTxLpgN8TvlnmOVQevCZ5iOAyAEEFkUdqkyZfO1Hz64ElfbLtVmIz8TaXb95LSfSE1nB4slsB3ly5wuHW2h_x19fgaa_gXpc7oeFonX0n2WHv2FyqlfUbcF60cjuz2Kh53NyGrwAQd1NX35OQTCKDBQAw0L1yWc.DCA23NGRKKoRYE4mKJetc8WwjOXg6QIhlV0peR.Aoi1LM",mdrd: "IQHPjkFAe0.G1pP.7EmV8MRSu4yUFZ_7I6cMfF7wDOA-1743186832-1.2.1.1-fALxsWqtemPaAWPKqn0AJ4FskveSxNlKgZG5JHGJdKgBepYKDAHq5d0uSqPGI.FBqpOP5.yrNiTZmsews4SdWzCMz5MgdNzRDmtENSoWLffAGRmvZmK.2NXsado3tZ92WMN86tkNzECe5.UqPcTi2CPGmpR2xehRfje_MST9e8PilaZ_QCRSRCiPo9h6FXuU6BQTxpm1Du9wWOvR4YZmd5gIXkb1egCn.lQwsZcEVYK_EjQKZu88HGNcnUsO5ekttjVGcL_NeUtxueCDqk2ddId1dbxJbZIc3eiio.udaNWbQACDTakbzB8mKK5spQnXDM4fIiO6_RxMa6PL._hChnqA0Z.mnoQqOd2pDsbm349OySJrA840Uv9PpYaduQ1GVBYdeqkIKk8Mj_N5BgnCVFvWZkx5Wpz5YCoMZk7oRNuj0RbdOH3OokEHKMrD3jPFG2mUtpjhCYPDRl0Dg8sVExqjcD4VtyfGnu4YGvOdgxt2mERn_BY5r8g5Lq4QBNVXmghsbLRsIxDIRcSIgFsCRBxX7e6cUQ7g1zBKMO9nqUvZYZB4qzcrEyWU2CzzCnuIjMqtbnZ.0csKnRYpLUFpHiIMRStxUWfB3WYACFkqgLKBKvsFx8rpIc3CbxnQ5Gy6gkvlqDgBbAn_pWoqI4wLYzm8E6oU76Io6sIIRLNQZ41.jkkSC30BNwS7EZZ9ALezPzreXr9m9AvXfdp20aa5HNmmBsfRVC7EVg5qoGK17PvP4Ja33MhWV8SvviQxV2N3YI6u5WXZNwUxvDT688xPsglXUEvibWLMmabhhq.BW_d6E9xmy59j0h8xpL2j7YGVhcAUW1xhB.7hGzVXMKP2XrzTUQ9ZYCO.QCLL924ZIxIDi4t3zHCAdxcXwNvlwZVGwjz1R0XBnphz3.9kT6QUZqrBwk3JM3lZ4K7Ku5zVcOx7F9reVoi4x5b16v7pWMS.rUplNmPizUG1BYzGYoWfR_UZTuWFX2nO2iftVhOFErSma8xBK2F1FJeh8EHV6fNAUB7xPlrM7sEvxyoE0a0bzShMHoRkENvZhkXr3ZDLJq1BycFxPQxqr47j58i5gX_CUgH0GIogs.8Et2HNxuef2aS4LvUTQonPUDPd66eTmOmI2MbbVeyzoPUD_ryP9960eFzfXHuGFf1QGlu4dFJ..lB4RtN4QONtsKfP2g2j3_9CFFXJUaT.dXjFtgmV1EY8zVBNW9laxYjPkKBrYgG2V1B_s0FXc_8yRBEvLlX6ym2c67Jhyrfu3nYPcjr7LY1HI6rvipybJ_1e59j_SRRbB2UEHxzkQW64sISwxFXWaxBVgiik78IfcF2_w5pGiTOog6ZEQNnZmJuH5bHzufOT2k3XYQPbzONQq7E_WrVzxLyKNUuL_zCUnqDwSOp1f2BToy69FW_Jdnn5ZbkXBm2qQkh_oAcUYrgtnK2Pn9n4HP_qlxnruGGQKFVshlfWzVOcoctTsOA5xumtH1QEeAmvo.Sq1s839zc3jUejKfEGQajx0TJmLZPmv2rqp_Y496kLFqBSgtvXieuQ8sENZK3KJQlXO7GKePMjElww06MHTXMn4i6bQA_hmsYUxE7yxAT5enuAy6z64tLh5jaES7ArmAWknI4Xbs_sp91KXAxEnmWDE3scMrSHxqtMeLjbIkOnYgclzkv2wV0y_f.MTr0._Nn7VfC4zep3cpRVccqX0honEu_PUEgdaDGhQpY0KwL72LcSVLdVrEtkqsO.k_obaUf0a84OluuXDbouLM_WxfafweRHM0L6LKFv0hRrYyqgma5m8rR6OAP.mnYmah8gkqigq_Q6zfsNaXDjoJ6ThT5xD1pLZTauSq4L02ljTWZAOrKfGXwMP0m0qzMYoLo8_F8dA7bC.BU0WByWwhLoGbEyAbyHVsqyr.fQSfG9A8gkjXUyOgob8w6rnVKbNnj0uPZ5TcB.EXsZu9dBvdSs_mBGTdmAF8eoNDctVo9Q7ob79_lHXQVLHGzjdv7Htjvte_AmSsoR7UjTBD2X.BLkt5QUiC14UAQAEd6UVMwwSzuwnVaOFnKW_Yat.O0C5NXRwg"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=927937e5ef43fd33';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/html\/rfc8252?__cf_chl_rt_tk=PYYCrQ_aFAvUhlLc7UWU8IJ2Zhbf1d67djusafGGai4-1743186832-1.0.1.1-Mn70rP9ewEbaL7fRktPLRnem5kbhNPi_Gc8TY26ACBg" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>