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PWAに取り組む前に知っておきたい SPAとSEO
seya
February 01, 2020
Technology
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2.8k
PWAに取り組む前に知っておきたい SPAとSEO
seya
February 01, 2020
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Transcript
PWAʹऔΓΉલʹ͓͖͍ͬͯͨ SPAͱSEO @PWA Conference 2020/02/01
ؔ ݑ @sekikazu01 גࣜձࣾLinc’well ΤϯδχΞ
PWA SEO ✖
PWA ֓೦తʹͦΜͳʹؔͳ͍ SEO ✖
18"ͰΞϓϦϥΠΫͳମݧΛఏڙ͢ΔͨΊʹ ಈతʹίϯςϯπΛඳը͢Δ͜ͱ͕͠͠
18"ʹऔΓΉલʹ 4&0ͷϦεΫΛֶͼ ϏδωεΛᆝଛ͠ͳ͍ Α͏ʹ͠·͠ΐ͏ʂ
ຊͷ͓ ͢͜ͱ • SPAͷߏஙΛݕ౼͍ͯ͠Δ͜ͱΛલఏͱ͠ʮSEOͷͮ͘Γʯͷํ๏ʹ͍͓ͭͯ ͠͠·͢ɻ • ͍ΘΏΔςΫχΧϧSEOͱݺΕΔͷͷҰ෦Ͱ͢ɻ ͞ͳ͍͜ͱ • ϥϯΩϯάΛͲ͏্͍͔͛ͯ͘ͳͲ۩ମతͳSEOςΫχοΫʹ͍ͭͯ͠·ͤΜ
·ͨɺલఏͱͯ͠ݕࡧΤϯδϯͷΈΛߟྀ͍ͯ͠·͢
Agenda l4&0zͱͳʹ͔ 1 41"ʹ͓͚Δ4&0ͷ՝ ͲΜͳղܾࡦ͕͋Δͷ͔ ཁٻύλʔϯ͝ͱͷղܾࡦͷબͼํ 2 3 4
“SEO”ͱͳʹ͔ 01.
SEO = Search Engine Optimization
ʮ4&0ͷʯͦͦͷͱͯ͠(PPHMFCPUʹΠϯσοΫε͞ΕΔ͜ͱ ͦͷͨΊʹ࣍ͷ͕̎ඞཁ (PPHMFCPUʹΫϩʔϧ͞ΕΔ͜ͱ )5.-͕దʹղऍ͞ΕΔ͜ͱ
ʮ4&0ͷʯͦͦͷͱͯ͠(PPHMFCPUʹΠϯσοΫε͞ΕΔ͜ͱ ͦͷͨΊʹ࣍ͷ͕̎ඞཁ (PPHMFCPUʹΫϩʔϧ͞ΕΔ͜ͱ )5.-͕దʹղऍ͞ΕΔ͜ͱ ˞͜Εʹ͍ͭͯTJUFNBQͱ͔ؤுͬͯ ͘ΕͬͯͳͷͰࠓ৮Ε·ͤΜ
'BDFCPPL0(1 5XJUUFS$BSE 'BDFCPPLͷ0(15XJUUFS$BSEͳͲz4&0zͷจ຺ͰޠΒΕΔ͜ͱ͕͋Δ ࣮ࡍશͬͯ͘4&0Ͱͳ͍ͷ͕ͩɺҰॹʹޠΒΕΔͷ͕ͨΓલͷੈͷதʹͳͬ ͯ͠·ͬͨͷͰຊτʔΫͰ߹Θͤͯड़Δɻ
ߏԽσʔλ ݕࡧ݁ՌͰͷදࣔΛϦονʹͯ͘͠ΕΔͷ IUUQTEFWFMPQFSTHPPHMFDPNTFBSDIEPDTHVJEFTTFBSDIHBMMFSZ
ߏԽσʔλͷྫ ".1 “ಡΈࠐΈ͕΄΅ҰॠͰྃ͠εϜʔζʹදࣔ͞Ε ΔັྗతͳΣϒϖʔδΛ؆୯ʹ࡞Ͱ͖ΔΦʔ ϓϯιʔε ϥΠϒϥϦ” - ߴԽʹͱ͜ͱΜͩ͜Θ༷ͬͨ - ಠࣗͷJSΛ࣮ߦͰ͖ͳ͍ͳͲͷ੍͕͋Δ
ࢀߟIUUQTXXXBNQQSPKFDUPSHKBEPDT
ߏԽσʔλͷྫಈը IUUQTEFWFMPQFSTHPPHMFDPNTFBSDIEPDTEBUBUZQFTWJEFP IMKB
·ͱΊ ʮ4&0ʯͱ͍͏ݴ༿͕ΘΕΔ࣌ʹ࣍ͷೋͭͷจ຺͕͋Δ (PPHMFͷݕࡧ݁ՌͰΑΓ্Ґʹදࣔ͞ΕΔͨΊͷࢪࡦ 0(15XJUUFS$BSEɺ".1ͳͲͷߏԽσʔλͷදࣔ ˞ຊτʔΫͰ͜ΕҎ߱શ෦ͻͬ͘ΔΊͯʮϝλใʯͱݺͼ·͢ ҰൠతͳݺͼํͰͳ͍Ͱ͢ ʮ4&0ͷʯΛ࡞ΔͨΊʹ࣍ͷ͕̎ඞཁ
(PPHMFCPUʹΫϩʔϧ͞ΕΔ͜ͱ )5.-͕దʹղऍ͞ΕΔ͜ͱ
SPAʹ͓͚Δ SEOͷ՝ 02.
None
ͳʹରࡦ͍ͯ͠ͳ͍41"ͷૉͷ)5.-͜Μͳײ͡
՝λΠϜΞτ ͨΓલ͚ͩͲͣͬͱͬͯ͘ΕΔΘ͚Ͱͳ͍ ϦΫΤετʹ͕͔͔࣌ؒΓ͗͢ΔͱͦͦΠϯσοΫεͯ͘͠Εͳ͔ͬͨΓ த్ͳͱ͜ΖͰϨϯμϦϯά͕ଧͪΒΕͯ͠·ͬͨΓ͢Δ
Կඵ·ͰͳΒͬͯ͘ΕΔͷ͔ʁ IUUQTNFEJVNDPN!MNVHOBJOJTQBBOETFPJTHPPHMFCPUBCMFUP SFOEFSBTJOHMFQBHFBQQMJDBUJPOGFBC ৄࡉʹݕূͯ͘͠Εͨํ͕͍ͨͷͰύΫΓ݁ՌΛ͓आΓ͠·͢ લఏ &MNͰͰ͖ͨ41"αΠτ QVTI4UBUFͰϖʔδΛมߋ͍ͯ͠Δ
Կඵ·ͰͳΒͬͯ͘ΕΔͷ͔ʁ ݕূ༰ ҎԼͷ̏ύλʔϯΛΞοϓσʔτ͢Δ͜ͱʹΑͬͯλΠϜΞτʹ͔͔Δ࣌ؒͷݕূ ࣌ؒͷදه UJUMF EFTDSJQUJPO ϖʔδͷςΩετ ຖඵมԽ
5ZQF" ඵͷEFMBZΛ࣋ͬͨϦΫΤετ 5ZQF# ඵͷEFMBZޙʹϦΫΤετ
Կඵ·ͰͳΒͬͯ͘ΕΔͷ͔ʁ ݕূͷ֬ೝํ๏ 'FUDIBT(PPHMFͱl/BUVSBMzͳ(PPHMFͷΠϯσοΫεͰ֬ೝ͢Δ
Կඵ·ͰͳΒͬͯ͘ΕΔͷ͔ʁ ݁Ռ 'FUDIBT(PPHMFͰඵͬͯ͘ΕΔ l/BUVSBMzͳ(PPHMFCPUͰඵͬͯ͘ΕΔ ˞ͪͳΈʹવͷ͜ͱͳ͕Β(PPHMF͕ͲΜͳڥ ճઢϚγϯύϫʔ ͰϨϯμ Ϧϯά͍ͯ͠Δͷ͔ෆ໌Ͱ͢ɻ
Կඵ·ͰͳΒͬͯ͘ΕΔͷ͔ʁ தͷਓͷ͓ݴ༿ˏ+BWB4DSJQU4JUFTJO4FBSDI8PSLJOH(SPVQ CZ+PIO.VFMMFS
ٙλΠϜΞτͨ͠ΒΠϯσοΫεͯ͘͠Εͳ͍ͷ͔ʁ ઌ΄Ͳͷݕূ͕͍ࣔͯ͠Δ௨ΓλΠϜΞτͯ͠ɺͦΕ·ͰʹϨϯμϦϯάͨ͠ ͷʹؔͯ͠ΠϯσοΫε͞Ε͍ͯΔɻ ͓ͦΒ͘Ұ1BJOUʹࢸΔ·ͰʹλΠϜΞτΤϥʔ͕ى͖Δͷ͕ذͳͷͰɻ ˞ະݕূͷԾઆͰ͢ɻࢀߟఔʹཹΊ͍ͯͩ͘͞ɻ GSBNF
՝ϝλใαʔό͔Βฦ࣌͢Ͱ)5.- ʹؚ·Ε͍ͯΔඞཁ͕͋Δ ͦͦ+4Λ࣮ߦͯ͘͠Εͳ͍ͷͰɺ αʔό͔Βฦͬͯ͘Δ࣌Ͱ)5.-ʹؚ·Ε͍ͯͳ͍ͱղऍͯ͘͠Εͳ͍ ͪͳΈʹ".1ͩͱϝλใʹݶΒͣશͯαʔόଆͰඳը͢Δඞཁ͕͋Δ ❌
՝3FOEFS2VFVFʹΑΔΠϯσοΫεͷԆ +4Λ࣮ߦ͢ΔαΠτ)5.-͚ͩͷ੩తͳαΠτͱҟͳΓɺ͙͢ʹΠϯσοΫε͞ΕΔ༁Ͱͳ͘ɺ Ұ3FOEFS2VFVFͱ͍͏ͷʹॲཧ͕Ҡৡ͞ΕΔ
IUUQTXXXZPVUVCFDPNXBUDI W:1U.#IZ6* ि͔͔ؒΔ͜ͱʂ ͳͷͰίϯςϯπͷߋ৽͕සൟͳαΠτͰʹͳΔ
ͪͳΈʹʜ͜ΕΒͷ՝ʹ Ͳ͏ߟ͍͑ͯΔͷͰ͠ΐ͏͔ʁ
IUUQTXXXZPVUVCFDPNXBUDI W:1U.#IZ6*
ʮ3FOEFS2VFVFʹΑΔΠϯσοΫεͷԆʯ ʹؔͯ͠কདྷతʹղܾ͞Εͦ͏
ੲͷจݙړͬͯΔͱ(PPHMFCPU͕ѻ͍ͬͯΔϨϯ μϦϯάΤϯδϯ$ISPNF૬Έ͍ͨͳ ใग़ͯ͘Δͱࢥ͍·͕͢ IUUQTEFWFMPQFSTHPPHMFDPNTFBSDIEPDTHVJEFTSFOEFSJOH ˞$ISPNF݄ࠒʹग़ͨϒϥβ
˞$ISPNF݄ࠒʹग़ͨϒϥβ ͱݴ͏Α͏ͳ͜ͱ͕ 20195݄Ҏདྷ࠷৽ͷChromeͱಉ͡όʔδϣϯ ͷػೳͰϨϯμϦϯά͢ΔΑ͏ʹͳΓ·ͨ͠ɻ https://webmasters.googleblog.com/2019/05/ the-new-evergreen-googlebot.html ͱ͍͑ Fetch as Google
Ͱͷ දࣔ֬ೝ͘Β͍͠ͱ͍ͨํ͕҆৺͔ͳ…
·ͱΊ 41"Ͱ4&0ͷΛ࡞ΔͨΊʹ࣍ͷ՝Λೝࣝ͢Δ λΠϜΞτʹΑΓ ͦͦΠϯσοΫε͞Εͳ͍ ෆશͳใ͕ΠϯσοΫε͞Εͯ͠·͏ ϝλใαʔόଆͰϨϯμϦϯά͢Δඞཁ͕͋Δ 3FOEFS2VFVFʹΑΔΠϯσοΫεͷԆ
ͲΜͳղܾࡦ ͕͋Δͷ͔ 03.
ϝλใ͚ͩ443 *OEFYIUNM ϒϥβ ϝλใͷ෦͚ͩ 63-ʹԠͯ͡ॻ͖͑ ϝλใ͑͞ө͞ΕΕʜͦΜͳϛχϚϜͳରԠΛ͍ͨ͋͠ͳͨʹɻ
%ZOBNJD3FOEFSJOH QSFSFOEFS IUUQTEFWFMPQFSTHPPHMFDPNTFBSDIEPDTHVJEFTEZOBNJDSFOEFSJOH QSFSFOEFSJP SFOEFSUSPO
QSFSFOEFSJPͷྫ Prerender Service Google bot ? (UserAgentͰఆ) :FT DBDIF͞Εͯͳ͍ )FBEMFTT$ISPNF
DBDIF͞ΕͯΔ /P JOEFYIUNMͱ+4ฦ͢ DBDIF DBDIF͢Δ
%ZOBNJD3FOEFSJOH QSFSFOEFS IUUQTXXXZPVUVCFDPNXBUDI W1'X6CHWQEB2 (PPHMF*0ʹͯ ଟ ॳΊͯ ʮ%ZOBNJD3FOEFSJOHʯ ͱ͍͏໊લ͕͍ͭͨɻ
(PPHMF͓͖ͷख๏ɻ
ΫϩʔΩϯάʹ͍ͭͯ ϒϥοΫϋοτ4&0ͷҰͭɻCPUͱϢʔβʹҧ͏ίϯςϯπΛฦ͢͜ͱΛࢦ͢ όϨΔͱϖφϧςΟ͕ՊͤΒΕΔ Σϒ αΠτ Google bot Ϣʔβ
ΫϩʔΩϯάʹ͍ͭͯ 'FUDIBT(PPHMFͰݟΕΔ௨Γ(PPHMFͳΜΒ͔ͷํ๏ͰϢʔβ͕࣮ࡍʹݟΔ ը໘Λ࠶ݱ͍ͯ͠ΔɻΘ͟Θ͟(PPHMF͕ࣗ%ZOBNJD3FOEFSJOHΛਪ͍ͯ͠ Δ͜ͱ͔Βɺ6"Ͱग़͚͍ͯͯ͋͠ΔఔಉҰͳΒେৎͳͣ ଟ ɻ
·ͩհ͍ͯ͠ͳ͍ख๏͋Γ·͕͢ɺ ର4&0ʹؔͯ͜͠ͷ%ZOBNJD3FOEFSJOH͕ສೳͷιϦϡʔγϣϯͰ͢ɻ λΠϜΞτ ϝλใ 3FOEFS2VFVF ˠΩϟογϡ͔Βฦ͢ͷͰແ ˠαʔόଆͰඳը͢ΔͷͰ0,
ˠ+4࣮ߦ͠ͳ͍ͷͰ3FOEFS2VFVFʹೖΒͳ͍
4UBUJD4JUF(FOFSBUPS ࣄલʹ)5.-Λੜ 3FBDU7VFͳͲͷ41"ϥΠϒϥϦͰߏங
࣍ͷΑ͏ͳͷ͚ͩΫϥΠΞϯταΠυʹͤΔͱ͔Ͱ͖ΔͷͰΣϒΞϓϦʹҰ෦͏ ͱ͔Ͱ͖Δɻ ɾϩάΠϯͨ͠ϢʔβͷΈݟΒΕΔ ɾϢʔβΧελϚΠζ͞ΕͨϨίϝϯυΛग़͢ ͋ͱͰৄࡉʹ৮ΕΔ͕ɺϢʔβମݧ্͛ͭͭ(FMPͷ্) ͦ͜·Ͱ։ൃΛେมʹͤ͞ͳ͍ͰSEOͷ৺ݮΒͤΔख๏ͱͯ͠ ͳ͔ͳ͔ے͕͍͍ͱࢥ͍ͬͯΔ
443 4FSWFS4JEF3FOEFSJOH ϒϥβ αʔόଆͰ+4Λ࣮ߦͯ͠ )5.-Λੜ
ҙ44(443ͰλΠϜΞτ͋ΓಘΔ Φνʔϊ༷ͷࣄྫ IUUQTEFWFMPQFSTPVDDJOPDPNFOUSZ Rails+ReactͳSPAαΠτͰSEOΛ͠Α͏ͱͯ͠Ϳ͔ͭͬͨน
ཁٻύλʔϯ͝ͱͷ ղܾࡦͷબͼํ 04.
ٕज़બఆʹؔΘΔཁૉ ʮͱΓ͋͑ͣ͜Εʹ͓͚ͯ͠ϤγʂʯΈ͍ͨͳۜͷؙͳ͍ɻ Ϗδωεཁٻ͋Εɺͦͷ৫ͷٕज़ྗεΩϧηοτʹؔΘΔͱ͜Ζ͕ େ͖͍ͷͰɺࣗͷঢ়گΛؑΈͯదͳҙࢥܾఆ͕Ͱ͖ΔΑ͏ʹ͠·͠ΐ͏
ߟ͑Δ͜ͱ1. සൟʹߋ৽͞ΕΔ & ͙͢ʹΠϯσοΫεͯ͠΄͍͔͠Ͳ͏͔ ͜͜ͷ৴པੑΛٻΊΔͳΒ Dynamic Rendering ͢Δ͔͠ͳͦ͞͏ - ݸਓతͳԾઆͱͯ͠ɺRender
Queue ʹೖΕΒΕΔ͔Ͳ͏͔ <script> λά ͕͋Δ͔Ͳ͏͔Ͱఆ͍ͯ͠ΔͷͰͳ͔Ζ͏͔ ྲྀੴʹ͜Εͩͱରશ෦ʹͳͬͪΌ͏͔ΒϑΝΠϧαΠζͱ͔XHRϦΫΤετൃੜ͍ͯ͠Δ͔ͱ͔ ͔ - Ծʹ্ه͕ਅͳ߹ɺSSRSSGͰෆ҆ΔɻDynamic Renderingͩ ͱ script λάফͤͨΓ͢ΔͷͰ৺͍Βͳ͍
ߟ͑Δ͜ͱ2. SSG or SSR ͢Δ͔ී௨ͷSPAͰߦ͔͘ 44(PS443 ૉͷ41" ϝϦοτ - ॳظද͕ࣔ͘ͳΔ
- SEOରࡦʹ͜ΕҎ֎ͷઃఆ͠ ͳ͍͍ͯ͘ - ։ൃ͕ൺֱ͢Δͱؾʹ͢Δ͜ ͱݮָͬͯ σϝϦοτ - ։ൃқ্͕͕Δ - FMPͷ্͕಄ଧͪʹͳΔ - ϏδωεཁٻʹΑͬͯ Dynamic RenderingHeadͩ ͚SSRͳͲผ్ରԠ͕ඞཁ
SSGSSRͷ։ൃқʹؔͯ͠ ΊΜͲ͍͘͞ͱ͜Ζ - ᷖᮣʹϒϥβʹ͔͠ଘࡏ͠ͳ͍ΦϒδΣΫτ(windowͱ͔)͏ͱϏϧυ ͕͚͜Δ(͕ࣗؾΛ͚͍ͯͯ͏ϥΠϒϥϦ͕ରԠͯ͠ͳ͚ͯͯ͘͜ Πϥοͱ͖ͨΓ͢Δ) - hydration(αʔόαΠυͰඳըͨ࣌͠ͷঢ়ଶͱΫϥΠΞϯτଆͷঢ়ଶΛಉ ظͤ͞Δ)্͕ख͍͔͘ͳͯ͘༁͔ΒΜόάग़ͨΓ͢Δ
SSGSSRͷ։ൃқʹؔͯ͠ - ϑϩϯτ։ൃ׳ΕͯΔਓ͕͍ͳ͍ͱ৭ʑΊΜͲ͍ͷͰɺϏδωεཁٻతʹ ڧ͍ඞવੑ͕͋Δ͔ɺཁٻ͕ബ͘ɺ͍Δϝϯόʔͦͦ͜͜ϑϩϯτ։ൃ ͷܦݧ͋Δ͔ΒʮͱΓ͋͑ͣ͘ͳΔ͠SSG or SSRͰ࡞ͬͱ͔͘ʯͱݴ ͏ͷ͕OKͳ߹ʹબΜͩΒ͍͍ͷͰ
ߟ͑Δ͜ͱ3. SSR ʹ͢Δ͔ SSG ʹ͢Δ͔ େମͷΞϓϦέʔγϣϯͰSSGͷํ͕͍͍Μ͡Όͳ͍ʁͱࢥ͍ͬͯΔ - ։ൃқ͕SSRͱൺֱ͢Δͱ͍͔Β - SSRͷ߹ϨϯμϦϯάαʔόʔͷεέʔϥϏϦςΟΛؾʹ͢Δඞཁ͕͋Δ
͕ɺSSGͰඞཁͳ͍ - SEO͍ͨ͠ϖʔδ -> ϢʔβݸਓͷใͳͲಈతʹੜ͢ΔͷͰͳ͍ (͜ͱ͕ଟ͍)ͷͰཁٻతʹͳ͍͔Β
ͨͩɺSSRͷํ͕ϕλʔͳέʔε͋ͬͯɺSEO͍ͨ͠ϖʔδ͕ಈతͳͷɻ ྫ͑ϢʔβߘܕͷϒϩάαΠτͳͲ - ରͷϖʔδʹมߋೖͬͨΓهࣄ͕૿͑ΔʹશهࣄϏϧυΒͤΔͷ· ͋·͙͍͋͑ - ϦΫΤετʹԠͯ͡SSRͯ͠CDNΩϟογϡͤ͞Δํ͕ΑΓཁٻʹରͯ͠ے ͕ྑͦ͞͏
·ͱΊ - සൟʹߋ৽͞ΕΔ & ͙͢ʹΠϯσοΫεͯ͠΄͍͔͠Ͳ͏͔ → Dynamic Rendering͖͔͢ߟ͑Δ - SSR
or SSG ͢Δ͔ී௨ͷSPAͰߦ͔͘ → ϢʔβମݧνʔϜͷεΩϧɾ͍͖ͬͯΛݩʹߟ͑Δ - SSR ʹ͢Δ͔ SSG ʹ͢Δ͔ → αʔόଆͰඳը͍ͨ͠ϖʔδʹεέʔϥϏϦςΟ͕ٻΊΒΕΔ͔ɺ νʔϜͷεΩϧɾ͍͖ͬͯͳͲΛݩʹߟ͑Δ
CASE STUDY: ͱ͋ΔECαΠτͷྫ Next.jsΛͬͨSSG Ͱߦ͘͜ͱʹͨ͠ - Static RenderingFMP͕͘ͳΓϢʔβମݧʹϓϥε → কདྷతʹωο
τϫʔΫ͕͍͔͠Εͳ͍ւ֎ల։͋ΓಘΔͨΊॏཁ - ࣄલʹඳը͓͖͍ͯͨ͠ϖʔδ͕TopɺΧςΰϦৄࡉɺৄࡉͷΈͰɺ ϥΠϯφοϓ͕ͦ͜·Ͱ૿͑Δ͜ͱͳ͍͜ͱ͕໌Β͔ͩͬͨͨΊɺ͜ ͜ʹର͢ΔεέʔϥϏϦςΟ͍Βͳ͍ -> SSR Ͱ͋Δඞཁͳ͍
CASE STUDY: ͱ͋ΔECαΠτͷྫ - ΠϯσοΫεͷॏཁͰͳ͍͠ɺDynamic Rendering ͱ͔·͋· ͋ΊΜͲ͍ͷͰɺSSGͰ࡞Δํ͕ίετ͕͍ͱߟ͑ͨ - ·ͩϦϦʔε͍ͯ͠ͳ͍ஈ֊Ͱײड़ΔͷΞϨ͕ͩɺҰ෦ͷϥΠϒϥ
ϦͷSSRͷઃఆ͕ΊΜͲ͔͚ͬͨͩ͘͞Ͱී௨ͷSPA։ൃͱൺͯͦ͜ ·ͰେมͰͳ͍ - Ή͠Ζ Next.js ͷΤίγεςϜʹ͔ͬΕΔͳͲͷར͋Δ
͓ΘΓʹϢʔβʹͱͬͯʮ͍͍ͷʯΛ࡞͍ͬͯ͜͏ ʮFirst and foremost, we focus on the user.ʯ IUUQTXXXCMPHHPPHMFQSPEVDUTTFBSDIJNQSPWJOHTFBSDIOFYUZFBST
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Thank you for listening!!
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