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="120"></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: "id.loc.gov",cType: 'non-interactive',cRay: '8e9d3b514e5d40f5',cH: 'cecqdaWB6_OpWhMVnVLHTVCRjNEQcYM_eSiV8RT_OOg-1732827041-1.2.1.1-4uD2VFgdnKdYeYP6._M4tAIK5wKMKTbfRsd3X068AWHCiB2oC5xSz8iFG91leXa.',cUPMDTk: "\/vocabulary\/iso639-1\/vi?__cf_chl_tk=ljVEUJZSSdUEeuTh4oMg1OunqSy3Y6.WC1XGzApgODE-1732827041-1.0.1.1-YffswO7q9KsbStRJK0S6hPyxXHlG6RIxlMN9BmnEFms",cFPWv: 'b',cITimeS: '1732827041',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/vocabulary\/iso639-1\/vi?__cf_chl_f_tk=ljVEUJZSSdUEeuTh4oMg1OunqSy3Y6.WC1XGzApgODE-1732827041-1.0.1.1-YffswO7q9KsbStRJK0S6hPyxXHlG6RIxlMN9BmnEFms",md: "zL4ilSgML__mhrqHV9ge_CTu3.R7tR9dodByPaSvlrk-1732827041-1.2.1.1-dJ6WLPfVtUkvaakPNZ_pLG.4mDkW_Xr9aBWD9gh_pEvS7z.hYZqDE0L6tt2u3r5N.vldtaY7sjN8WY87fwfNW73MMawTYi2CXuNpTiVkkeYkaWPLbRQd_mc7_CrfSDmZojLAQcfQE.rl.BjlAVYCvO8KYtuhv8MD3Pr05nbNehXtptxFT3CSLxLh4jgEiiGHvPDFOhZuAEsAaArOhVzyYsMYwKJkntCUqnpZ7N43inS1GXJJfCxxi9q5Z.UylCgukdugG3wovjvkqRIaq9wfdDTj7w0nVZ2M7usvexTdpvSWdIzQw_FL3etqocX8HQX1yKzTvNg_g3inBLfav9NoORoe_jhxDg.ceuLrKj0DYA6t5lMmv4SRyT80KgsdsMk0N2dxzJopMPfFHf8ZO18qS7CP58mBiwJNt8ZaYw7Kag6p6NJPKcmrJWOtxJd1FUXu7mIyaQenhW9epV67tjWrJImKexAoaqc2.bTgf3HLhM8c5nSbKkCTiiUR4reh6lnzbUSopQiqg_ta2rwxp0M3AgKZZFEIUeQE0vJc7.62mr6ReEEl3sH1ODBj64aJshS7LWBGdeUCPHQ3zZrCMyQIxxcHIXGDiVpgM9pV.Vr4Z6z0Uno8hh3Dq.YVCJ4kubPfjkKTyopBxJ7ntZ83_R75pOhiin2EY7YRmbDupa2wnQSFD87PoTwjnWWFlsASwVRW3ydNt_Y6qas6ShcyMmcWr_ynMn9cU3xD6TVHI8b1cF.MHQBw4rn8kZO2GNG10hadP1diaG0mae1n1Z7obo9fVHjW80_Tb9Ia3QXVUsgAphHM5HjkPwwKUZAna9pPRQmilPT0V7EaEkIFVlT33EiWirJen8OziNFEpH2FOH1GdikATrfWN4lIzsVOhDcjk4LU6ebPOf9_fKxRpn5U.DZOZKCQI3wlNyQrTOly_h5ZBOJsBUuH0hg.FTcABdnH2OsLJjHxU68uvJcgyBk1DTD.o57edsXWTZ6ydcLydDurfgbBMBsdHbdwmxjWND3RFY5feb0Zb2duppzJYjYFbY2t14tIhhvi9uYja4cnyqL_aiRVH4DQ2RD14PWqRF08AQ9kCWKQO2q0xkhUdq0gTU0r4Kke0Ixrcxgm5ZDF.ANaZAEQcRNyMUrC7cnFePqxsWFM96bFakj2S6621qlD7n4QnBqbM.DDMFB8TvIsR7yovH9XOAFSxnolnUkB6ivGeTefnJFxq0RSOmcDYCytRuJYEUUZBUYDczhThWjlt9bXdkeJc3BInW9SEgpUJnWIeE8INwpkmVvB0qya2025gmqDrJLQB6Qnr9tc3gFqpBErnaytBsSeEPL1yQFp0tdW2MWdD8nliGezoAtvBVkVUrSETNNVQC1ygsmzrgj0lQ78zgfvAcVDmjWbHlHoVSWLcGdYGuPH_9vtk7ZM0ZahDoWrIllz8APF3KBhuB0o9GwbYnoxwks6zbfqc.KhfDOd.ZXznGPiZ96xIafNehqf88.E5jY8Ww8vHL8eyGnK8bt8VPSqrzbM0BpGx3hJSbNwYF.HJhJl6xslvoZHArjduVldtu0XiZbQVPvXFbV1JfVLxKgrt0.EPodL0jP3Zy4i0xkaElsFcd66FI3F_pX4DONRt6wr9VtQKyC7F3b7pk492XnEQ.GWVQpdIspfa_Mg7Q5exbr.tYXn9FZXwdVy5mPpezGjjkG.i0AHznaWe6DUepkshYQBrhizNeMAFJ84083BcbfDPmLyvlAi3A7kTjC5t5TxXpFnjWD.4VI7DKuxzTFT._gCsFPjVVEdFh9Ql.bM0oQ2S_0OsAzo6miTipyo_2nFoNruA_AWcvtmjU_QyNtJmrALbtBl9yOW3vfJujGiDt701NSH1uYzHxDRl.33sI0wREnEw4rucXKsGzzjUHkL9LhHJ3zUTzxGPcH5JGB_goz2mc9w0Z0kA81fc3IDtiqby12Hhkq6cLRaFJzZ9ZpDoVOrXeijj.KmvsvvmnxX",mdrd: ".cA8KtuQFwP64SC3zTM3GS_7h4Yh5gr8nHVsLZcIUC0-1732827041-1.2.1.1-0F4RpmPk.Qujw08VU3x1CNz0kR.FdmDmtSIRozoVVHYpx6JLzkLxl3h7pdAYcuypnqEYHz993W5Rl.BGQFvnAPuhwsUa.jPWD5f5FqS5GZxvswP.9kpmIg122BZDnMEUVUAGMOWqkDeDtCSIQ6wPYjFG73FFlzqksg3Bfr05F7vQg_PMsVlhtfucpvctBX_TJS49OrycZcw9ynJgSHi9y.6bpns1ohS.6tVwFVK7aAOpWpIgqMcdEwbX2MZhd68hy10GpaADmchUHwXJmgwgvbWhFxq4ibEs.WPZnBiXOTDzg8FQ.3Ue.NKAeV49q4DquRwS9bt3TJebzQexi16_Q8cJp6.zGc3UqNRwQHcvraiYtqQly15kc2LgcUBtZVMftBo042vHGos22BeqM1vMME_rnZ.bfojzsQjRPbvXurWpic3b5oiprOg2DNkk02gigLjT4lIyAwRN38O4ngvHeQosW0uqaRH8fgMWq5jkiFu_3pVYgBWFzIaOJ1vQbhOHei61pCRxlAJvSMQZ6LW7MM2dFtCS95aqHxrXU54tZjykHcUr6BR7EoMrHMr4vJnaAmp6wO3AG97ZyvLw4Hsn70.1K8Z1YmbAv8AbinPFSoKKiy.kv5JjCKcZxt4Jw0s5CYqq6OtmtTkGWTHnxYVeNDtMSoRq0WXp8krxVPtJq7T8N8zGizckCF9VrACR6loIHUU0LYSZYjkKn_PNHSBFAC0v8EwH8dvdyt_2wo3JHzw2ZXAMPeL0X6LK3mZwghRk3VTf60g32kI3mwy6B5TWR0AA8uXvY7ant2UIcMDcdfY2KVbthPwkS3FM08phuRI7lY2tQ4t9aJZ_XU8.CxaO.M.EdVBrEXO.NZ3G9PXKK2L1Ijonh7znjaCUGWD.n_EEmpmV6.5sMRKYMnYWZmwTs45W9315gMgLFQFb9LKq_K7cNJHwtPJnvSStF_q_jvfjhFpbSR4BpjnxYty066PJhRoX3KqL2rau7jiT5A1GZBsoWy1TifSOwuasZtaBML8aGGCiqVkMOQavV2CXOuSLXt8e.4oEwLNSwQG_rQfYILnrRgGGwoyUtzxDkZmnhwReZVfYnJdv_gbxysGaQkTOu2GK3pXQ.mLQciNgHpGJyt3HTFc9cg.74A4pvOQA9bNeC_CDHws4ZNNgOHao29iEe1KT6RLRYzT5PyTonOQk_A4NZKDnw7w9zwnBfavxbW9Zi96mSFaO5.S7xmQG5TeKL4wToHGOna9sFnFNSIq2Y3CD5k9wHyrCC3WUOcClxC5Yr7KZDz76LQlt8Was3tc7iFKNshCaSaeJlxMks0yDWJ5pbwwxwoXW3U0TnhUoYBy29UTkW2BdkItDaY5MT6X.yXuSpQI1poYT_veshtH7rVZCGiopB9R3LQ2.ZqFuR.u8BsOgjawrQ4ze2FuvUhWY_2QB9OQSSyDNXXGk822UFWSy3IUJ1exHLarfPKVO.ZAsRadgsladq22gGBKPaGjSWx4JePsjPoah.uneDkaVV47hUXyeyehdtn0HfsqWr1kG_T39SI.1_mKTKkQC_.v66TiCOrfsTjdkoZzuRTZDR4cCUj7dBqoTiun3NLHYXeEyvqJ.iO7rPLy07tVtO5kwKoNVqRKKK76ltsN2qK2AzLfKmFYyblgqwZWiTiSkBzKNSJq0StBbtn_WELT4Lkubbc9bKerxu6CqIO2FZgbNpANldhr9RtXyDqHaFvewn1Q9uG69p6hefXRWTDAlp3_w97vrqwenSTg7AvkcjK1kDQ7T6zaXareoGGVySe2CMewQB5V.BFrZ.eBwX1CY6rRg3ShEVeWZ08CbVjBMur6UH7W8LGusORkoCpbJI446yVBZ9A6qu7yt.NwPGDFMktc91rMQ6lM82w9OcN1EhdPKHdvZW.A4noX8h_ogeMndK7Ducxvbd3NJPLCjUukev4dfazDolVmsBpnQwRSrGa4neE8UQtO0lQSTfp9Pd9RD0lqE"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=8e9d3b514e5d40f5';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, "\/vocabulary\/iso639-1\/vi?__cf_chl_rt_tk=ljVEUJZSSdUEeuTh4oMg1OunqSy3Y6.WC1XGzApgODE-1732827041-1.0.1.1-YffswO7q9KsbStRJK0S6hPyxXHlG6RIxlMN9BmnEFms" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>