Software Development and Re-thinking Pattern Language

by https://speakerdeck.com/tkakeda

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ιϑτ΢ΣΞ։ൃͱ ύλϯɾϥϯήʔδ࠶ߟ θϯιʔ ݒా߶

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ຊ೔ͷΞδΣϯμ ✦ ࢲͷύλϯɾϥϯήʔδͷετʔϦʔ ✦ ιϑτ΢ΣΞͱύλʔϯͷग़ձ͍ͱൃల ✦ վΊͯߟ͑ͯΈ͍ͨύλϯɾϥϯήʔδ ✦ ࠓ೔ٞ࿦͍ͨ͠؍఺

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೥ ೥ ݒాɹ߶

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ࢲͱ ύλϯɾϥϯήʔδ

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σβΠϯύλʔϯ

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+BQBO1-P1 IUUQQBUUFSOTXHGVLBJO KBQBOQMPQJOEFYIUN

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ӬଓԽͷͨΊͷύλʔϯ ೥ࠒʹେม͓ੈ࿩ʹͳΓ·ͨ͠ʜ

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ͦͷଞͷύλʔϯຊ

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୔ాϚϯγϣϯ

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+BNFT0$PQMJFO

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ɹ౦༸ࢥ૝ʹ੢༸ٕज़Λ͔ͬ͠ΓͱऔΓೖΕ͖ͯͨͷ͕ɺ೔ຊ Ͱ͢ɻੜਮͷϤʔϩούͷཧ૝ओٛ΍ੜਮͷΞϝϦΧٕज़͚ͩ Ͱ͸ҝ͠ಘͳ͍͜ͱΛҝ͢࢈ۀͱͯ͠ιϑτ΢ΣΞ࢈ۀΛҐ ஔ෇͚͢ΔࢧபʹͳΔͷ͕ɺ೔ຊͳͷ͔΋͠Ε·ͤΜɻͦ͠ ͯɺͦͷΑ͏ͳ໨తΛୡ੒͢ΔͨΊͷྗ͸ɺ"MFYBOEFSͷݴ ༿Λୈೋͷఱੑͱͯ͠ཧղͰ͖Δೳྗͱɺͦͷݴ༿Λࠃࡍతʹ ೝΊΒΕͨઐ໳ٕज़ͱ౷߹͍͚ͯ͠Δೳྗͱʹ͔͔͍ͬͯΔͷ ͔΋͠Ε·ͤΜɻͥͻɺ͜ͷ͜ͱʹ͍ͭͯɺօ͞Μʹߟ͍͑ͯ ͖͍ͨͩͨͱࢥ͏ͷͰ͢ɻͦͯ͠ɺ΋͠ಉҙ͠ڠྗͯ͠Լ͞Δ ํ͕͍Βͬ͠ΌͬͨΒɺͥͻɺࢲʹ͓஌Β͍ͤͩ͘͞ɻօ͞Μ ͷ੒ޭΛ஌Ε͹خ͍͠Ͱ͢͠ɺتΜͰԉॿΛਃग़͍ͨͱࢥͬͯ ͍·͢ɻιϑτ΢ΣΞύλʔϯ͸ίϛϡχςΟʹؔ܎͠·͢ɻ จԽͷҧ͍͕͋ͬͨͱͯ͠΋ɺࢲͨͪΛͱ΋ʹา·ͤͯ͘Ε Δ΋ͷͳͷͰ͢ɻ

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ͦ͜Ͱɺօ͞Μʹ͓ئ͍͍ͨ͠ͷͰ͢ɻ ͦͷಓ΁าΈਐΉखॿ͚Λ͍ͯͩ͘͠͞ɺͱɻ

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ࢀՃͷ·ͪͮ͘Γೖ໳ԋश

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ΞϨάβϯμʔࡇΓ

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ιϑτ΢ΣΞͱ ύλʔϯͷग़ձ͍ͱൃల ͓͞Β͍

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ྺ࢙͕ৄ͘͠ॻ͔Ε͍ͯΔɻ ઈ൛ɻग़൛ࣾࡏݿͳ͠ɻ ݹॻΛ୳ͤʂʂ

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,FOU#FDL 8BSE$VOOJOHIBN 8JLJͷൃ໌ऀ 91ͷఏএऀͷਓ 91ͷఏএऀ

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ΦϒδΣΫτࢥߟϓϩάϥϜͷͨΊͷ ύλʔϯݴޠͷ࢖༻ ̑ͭͷখ͞ͳύλʔϯΛΞ ϓϦέʔγϣϯεϖγϟϦ ετʹఏࣔͯ͠σβΠϯ͠ ͯ΋Βͬͨɻͦͷ݁ՌɺϢʔ βʔࣗ਎͕γεςϜΛσβ Πϯ͢Δ͜ͱ͕Ͱ͖ͨɻ ͜ͷ݁Ռɺೋਓ͸ίϯϐϡʔ λʔϢʔβʔࣗ਎͕ࣗ෼ͷ ΞϓϦέʔγϣϯΛσβΠ ϯ͠ϓϩάϥϛϯάͰ͖Δ Մೳੑʹ೤ڰͨ͠ɻ 8JOEPX1FS5BTL 'FX1BOFT1FS8JOEPX 4UBOEBSE1BOFT 4IPSU.FOVT /PVOTBOE7FSCT http://c2.com/doc/oopsla87.html

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ᶃར༻ऀࢀՃͷσβΠϯ ✦ ύλϯɾϥϯήʔδΛ࢖͏͜ͱͰɺར༻ऀࣗ਎͕ΞϓϦέʔγϣ ϯΛσβΠϯ͠ɺࣗ਎Ͱ࣮ݱͰ͖ΔՄೳੑΛ໛ࡧͨ͠ɻ ✦ ΦϦδφϧͷύλϯɾϥϯήʔδͷࢥ૝ʹ͍ۙ

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)JMMTJEF(SPVQ ✦ ೥ʹϕοΫɺϒʔνɺΧχϯΨϜɺίϓϦΤϯɺδϣϯι ϯΒ͕ू·Δ ✦ ύλϯɾϥϯήʔδͷΞΠσΞΛΦϒδΣΫτࢦ޲ʹద༻͢Δ ͨΊͷٞ࿦Λߦ͏ ✦ ύλʔϯίϛϡχςΟઃཱɺ1-P1ʢ1BUUFSO-BOHVBHFPG 1SPHSBNTʣ։࠵΁

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σβΠϯύλʔϯ ΦϒδΣΫτࢥߟઃܭʹ͓ ͚Δ܁Γฦ͠ݱΕΔ໰୊ʹ ରͯ͠ͷղܾࡦΛύλʔϯ ͱͯ͠நग़ɾར༻Ͱ͖ΔΑ ͏ʹͨ͠ ೥

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ᶄ஌ࣝͷදݱͱڞ༗ ✦ ιϑτ΢ΣΞઃܭʹ͍ͭͯͷఆੴΛύλϯɾϥϯήʔδͱͯ͠ ܗࣜ஌Խ͢Δ͜ͱͰɺར༻ऀ͕ѻ͍΍ͨ͘͢͠ ✦ ιϑτ΢ΣΞ։ൃʹؔ͢Δ༷ʑͳ஌ݟΛʮ999ύλʔϯʯͱ͠ ͯڞ༗͢ΔจԽ͕ੜ·Εͨ

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։ൃ޻ఔͷ ੜ੒తύλʔϯݴޠ ✦ +BNFT$PQMJFOࢯʢ೥ʣ ✦ ։ൃϓϩηεɾ૊৫ͷύλϯɾϥϯήʔδ ✦ ʮ૊৫ͷ͋ΓํʯΛʮ౎ࢢͷ͋ΓํʯʹͳͧΒ͑ͨ ✦ ૊৫ύλʔϯɺ91΁ଓ͘ IUUQQBUUFSOTXHGVLBJO KBQBOQMPQ5SBOTMBUJPOT(

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͋Δ૊৫͸lແ໊ͷ඼࣭ 2VBMJUZ8JUIPVUB/BNF z<"MFYBOEFS>Λ͍࣋ͬͯΔɻ൴Β͸ɺגओʹརӹ Λ༩͑ɺސ٬ʹ͏·͘ରԠ͠ɺܧଓ͠৚݅Λຬͨ͠ࢧԉతͳ৬৔Λैۀһʹఏڙ͍ͯ͠ΔͷͰɺ໨తʹ ͔ͳ͍ͬͯΔɻ͜ͷΑ͏ͳ੒ख़Ϩϕϧʹୡ͍ͯ͠Δ૊৫͸ɺଞͷ͢΂ͯͷ໘Ͱ΋༏Ε͍ͯΔͱࢥΘΕΔɻ ͜͜Ͱࣔ͞Ε͍ͯΔύλʔϯ͸ɺͦͷΑ͏ͳ૊৫Λߏங͢Δ͜ͱΛՄೳʹ͢ΔͷͰ͋Ζ͏͔ʁɹ͜ΕΒ ͷύλʔϯ͸ɺ࢜ؾ΍Ϗδωεͷ੒ޭΛ࣋ଓͤ͞Δͷʹ໾ཱͭจԽΛఆ͍ٛͯ͠Δ͕ɺ࡞ۀੜ׆΍࢜ؾ ͷ඼࣭ʹ௚઀తʹӨڹΛ༩͑Δ΋ͷͰ͸ͳ͍ɻ͜ΕΒͷύλʔϯ͸ɺ࡞ۀऀͱ஥ؒɺޏ༻ऀͱඃޏ༻ऀɺ ͋Δ͍͸ձࣾͱސ٬ͷؒͷ૬ޓͷ৴པؔ܎ͷΑ͏ͳΩʔͱͳΔཁૉʹܰؔ͘༩͍ͯ͠Δ͚ͩͰ͋Δɻจ Խͷଟ༷ੑɺձࣾͷڞಉମ΁ͷؔΘΓ͍͋ɺ͋Δ͍͸࢓ࣄͷ্Ͱͷ༨෼ͳڭՊ՝ఔͷ׆ಈͷΑ͏ͳଞͷ ཁૉ͸ɺ͜ͷύλʔϯϥϯήʔδͷٴͿͱ͜ΖͰ͸ͳ͍ɻॏཁͰͳ͍ͱ͍͏ཧ༝Ͱ͜ΕΒͷཁૉΛলུ ͢ΔͷͰ͸ͳ͍ɻ͜ΕΒͷ࿦఺͸ɺ૊৫্ͷ৺ཧֶ΍ࣾձֶͷઐ໳Ոʹै͍͍ͨɻ͜͜Ͱͷύλʔϯͷ ଟ͘͸ɺࣾձֶతͳ໘Λڧௐ͓ͯ͠Γɺ࢜ؾ΍ଞͷࣾձతͳࢦඪʹੜ੒తͳޮՌΛ࣋ͪͦ͏ʹݟ͑Δ͕ɺ ࣾձֶతͳ૾Λ׬੒ͤ͞Δʹ͸ɺ͜ͷύλʔϯϥϯήʔδʹଞͷύλʔϯϥϯήʔδΛ৫Γࠐ·ͳ͚Ε ͹ͳΒͳ͍ɻ͜ͷΑ͏ͳଆ໘͸ɺ͜ΕΒͷύλʔϯ͚ͩͰ͸੒ޭΛอূ͠ͳ͍ͱ͍͏໌Β͔ͳ݁࿦Λಋ ͕͘ɺ͞ΒͳΔݚڀͷͨΊͷҊ಺౮ͷ໾ׂΛఏڙͯ͘͠ΕΔɻ IUUQQBUUFSOTXHGVLBJOGPXBTFEBBDKQKBQBOQMPQ

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IUUQQBUUFSOTXHGVLBJOGPXBTFEBBDKQKBQBOQMPQ 5SBOTMBUJPOT(%1NBQIUN

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ᶅιϑτ΢ΣΞ։ൃͷपล΁ ͷ֦େ ✦ ιϑτ΢ΣΞΛੜΈग़͢૊৫ʢਓʑʣͷઃܭΛύλϯɾϥϯήʔ δͱͯ͠ද͠ɺͦΕΛ࢖͏͜ͱͰɺΑ͍ιϑτ΢ΣΞΛੜΈग़ ͢૊৫ͦͷ΋ͷΛσβΠϯ͠Α͏ͱࢼΈͨ ✦ ର৅ʢιϑτ΢ΣΞͦͷ΋ͷʣͰ͸ͳ͘ɺͦ͜ʹؔΘΔਓͼͱ Λύλʔϯͷର৅ʹͨ͠ɻ

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&QJTPEFT ڝ૪ྗͷ͋Δ։ൃͷύλʔϯݴޠ ✦ 8BSE$VOJOHIBNࢯʢ೥ʣ ✦ ։ൃϓϩηεͷύλϯɾϥϯήʔδ ✦ $PQMJFOͷ࿦จʹେ͖ͳӨڹΛड͚͍ͯΔ ✦ F9USFNF1SPHSBNNJOHͷݩͱͳΔ IUUQDDPNQQSFQJTPEF

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ᶆύλʔϯͱݺ͹ͳ͍ ύλʔϯ ✦ ʮύλʔϯʯͱ͍͏ݴ༿Λ࢖Θͣʹɺιϑτ΢ΣΞ։ൃ΍ɺνʔ ϜͷৼΔ෣͍Λදͨ͠ɻ ✦ ઴ਐతʹͻͱͭͣͭద༻͢Δͱ͍͏ΑΓ΋ɺ·ͱΊͯద༻͢Δɺ ͱ͍͏ܗΛਪ঑͍ͯ͠Δɻʢ࣮ࡍʹ͸Ұͭͣͭద༻͢Δ͜ͱ͕ ଟ͍ʣ

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ᶇυϝΠϯϞσϧͷ ઴ਐత੒௕ύλʔϯ ✦ ໰୊ྖҬʢυϝΠϯʣͷ஌ࣝΛ੒௕͍͖ͤͯ͞ɺϞσϧͱίʔ υΛෆՄ෼ʹ։ൃ͍ͯ͘͠΍Γํͷύλʔϯ ✦ ։ൃऀͱυϝΠϯ஌ࣝΛ࣋ͭਓʢϢʔβʔɺઐ໳Ոʣͷڞ௨ޠ ኮʢϢϏΩλεݴޠʣΛੜΈग़͍ͯ͘͠ɻ

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ύλʔϯ ໨ࢦ͍ͯ͠Δ΋ͷ ᶃར༻ऀࢀՃ ར༻ऀʹΑΔΞϓϦέʔγϣϯσβΠϯ ᶄ஌ࣝͷදݱͱڞ༗ ιϑτ΢ΣΞ։ൃʹؔ͢Δ஌ࣝͷ஝ੵͱڞ༗ ᶅιϑτ΢ΣΞ։ൃपล΁ ͷ֦େ ։ൃ͢Δର৅ͷιϑτ΢ΣΞͦͷ΋ͷ͔ΒɺͦΕΛ࡞ Δ૊৫΍ϓϩηε΁ͷ֦େ ᶆύλʔϯͱݺ͹ͳ͍ύλ ʔϯ ීٴɺηοτͱͯ͠ͷద༻ ᶇઃܭ΁ͷར༻ऀࢀՃ ར༻ऀΛר͖ࠐΜͩڞ௨ޠኮͷ࡞੒ɺઃܭͱ࣮૷ͷෆ Մ෼ ͜Ε·Ͱͷύλʔϯͷಈ͖ ·ͱΊ

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ΞδϟΠϧͱύλʔϯ ✦ ʮΞδϟΠϧ͸ɺύλʔϯ͕࣮ݱ͠Α͏ͱͨ͠ੈք؍Λɺύλʔ ϯͱ͍͏ݴ༿Λ࢖Θͣʹ࣮ݱ͍ͯ͠Δ׆ಈͰ͋Δʯ ✦ ϓϩμΫτɾνʔϜͷ༗ػత੒௕ɾશମੑ࣮ݱɺ෦෼తར༻ऀ ࢀՃܕʢϢʔβʔετʔϦʔɺFUDʣ ✦ ৽نϏδωεɾاۀΛབྷΊͯɺϦʔϯɾελʔτΞοϓɾϦʔ ϯΤϯλʔϓϥΠζʹͭͳ͕Δ

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http://www.ipa.go.jp/sec/softwareengineering/reports/20130319.html ೔ຊͷΞδϟΠϧͷ ࣄྫͱ޻෉ͷऩू ೥౓

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ར༻ ϓϥΫςΟε਺ % n 24 48 4 01 n 1 n n =6= )( 45

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RRX:KX?1V5 2?TX9PVKX?1V5 2?TX9PV KX?1V5 +-&%- :HRVATFNX :HRVAD>4U5 HU=4AD>4U5Y 'Z HU=4A3XBX G/9R?XA?:A* ?:A 9:?LMH 6X@1V5 3V72A! * $#*60HQ4?1: :4QL*60HQ4?1: * HQ4?1: εΫϥϜ͸ϓϩηεɺ໾ׂɺ੒Ռ෺ 91͸ϓϩηεɺΤϯδχΞϦϯάςΫχοΫɺ؀ڥ

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ιϑτ΢ΣΞϫʔϧυͰͷ ύλʔϯ ✦ ʮԿΛ࡞Δ͔ʯͰ͸ͳ͘ʮͲ͏࡞Δ͔ʯ ✦ ར༻ऀࢹ఺Ͱ͸ͳ͘ɺ։ൃऀࢹ఺ ✦ ʮ࢖͏ʯΑΓʮڞ༗͢Δʯʹॏ఺ʁ

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վΊͯߟ͑ͯΈ͍ͨ ύλϯɾϥϯήʔδ

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ࢀՃͷ·ͪͮ͘Γԋशʹ ࢀՃͨ࣌͠ͷٙ໰ ✦ ʮύλʔϯΛ·ͱΊΔʯΑΓ΋ʮͲ͏࢖͏͔ͷ΄͏͕େࣄͰ͸ͳ͍ ͔ʁʯʢ/PUϓϩδΣΫτϥϯήʔδʣ ✦ ར༻ऀࢀՃͷҙຯˠݩʑΞϨάβϯμʔ͕΍Ζ͏ͱͨ͜͠ͱɾຊ౰ͷ Ձ஋ͷੜ੒ ✦ ಛఆͷΧςΰϦʢσβΠϯɺ૊৫ɺϓϩηεʣͰ͸ͳ͘ɺશମੑΛੜ Έग़ͨ͢Ίͷύλϯɾϥϯήʔδͱ͸ͳʹ͔ʁ

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ͷ΂ΒΕ͍ͯΔ͜ͱ ✦ ͍͖͍͖ͱͯ͠·ͱ·Γͷ͋Δࣾձʹ͸ಠࣗͰݻ༗ͷ໌֬ͳύ λʔϯɾϥϯήʔδ͕͋Δ ✦ ࣾձ͢΂ͯͷݸਓ͕ʢ෦෼తʹڞ༗͢Δͱͯ͠΋ʣࣗ෼ͷؾ࣋ͪ ʹ߹ΘͤͨͦͷਓಠࣗͷϥϯήʔδΛ࣋ͭ ✦ ఏࣔ͢ΔύλʔϯΛࢳޱͱͯ͠ɺࣗ෼ͷύλϯɾϥϯήʔδΛ ֮ࣗ͠ɺվྑ͍ͯ͘͜͠ͱΛئ͏

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"1-ͷύλϯ੔ཧ εέʔϧ छྨ ѻ͏ਓ ಛ௕ େ ؀ڥͷࠎ૊Έɺொɺί ϛϡχςΟɺ࢓ࣄͱՈ ఉͷؔ܎ ίϛϡχςΟ ʢͦ͜ʹॅΉਓʣ ઴ਐతʹੜΈग़͢ ࣗΒ࣮ݱ͢Δ த ཱମ෺ɺۭؒతͳ΋ͷ খूஂ ݸਓ ݐઃ͕Մೳ Ұ౓ʹ࡞ΕΔ ݱ৔Ͱݕ౼͢Δ খ ۩ମతͳݐஙɺݐ෺ࡉ ෦ɺϓϩηε ݸਓ ʢૉਓɾݰਓʣ ۩ମతɾந৅త ۩ମతͳࢪ޻ॱʹ߹க

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ύλϯͷ૬ޓؔ܎ ʢύλϯɾϥϯήʔδʣ ✦ ৗʹͭͳ͕Γʢγʔέϯεʣ͕͋Δ ✦ େ͖͍΋ͷ͔Βɺখ͍͞΋ͷ΁ ✦ ωοτϫʔΫߏ଄ʢෳ਺ͷγʔέϯεʣͰ͋Δ ✦ ̍ͭͷγʔέϯεͰ͸શମΛ೺ѲͰ͖ͳ͍ʢηϛϥςΟεʣ ✦ ͚ͬͯ͠Ұ౓ʹશ෦Λઃܭͨ͠Γݐઃͨ͠ΓͰ͖ͳ͍ ✦ ͻͱͭͻͱͭͷߦҝͷੵΈॏͶ͕ɺৗʹแׅతͳύλϯͷ૑଄΍ੜ ੒ʹܨ͕ΔΑ͏ʹ͢Δ

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ൃ ݟ ύλϯϥϯήʔδ Ωʔϫʔυ ʢύλϯʣ ύλϯ ύλϯ ύλϯ ύλϯ ύλϯ ύλϯ ύλϯ ੈք؍ ੈք؍ ੈք؍ ύλϯ ύλϯ ύλϯ ࣮ࡍͷݱ৔ ࣮ ݱ ৽͍͠ύλϯ ৽͍͠ύλϯ ৽͍͠ύλϯ ύλϯ ύλϯ ύλϯ ύλϯ ύλϯ ύλϯ ύλϯ ৽͍͠ύλϯ ৽͍͠ύλϯ ৽͍͠ύλϯ ϓϩδΣΫτϥϯήʔδ ʢ࣮ࡍͷݱ৔Ͱੜ·ΕͨύλϯΛ࢖ͬ ͯϥϯήʔδԽʣ Πϝʔδͷੈք ݱ࣮ੈք ݱ࣮ੈքͷϑΟʔυόο Ϋ͔Βൃݟ͞Εͨύλϯ Λ૊Έ߹Θͤͨ΋ͷ͕ϓ ϩδΣΫτϥϯήʔδɻ ͍͖͍͖ͱͨ͠ ੜ໋ײΛੜΈग़ͨ͢Ίʹ Πϝʔδͱݱ࣮ੈքΛ සൟʹߦ͖དྷ͢Δ ϓϩηε͕ॏཁʂ ੍໿ িಥ ՝୊ ηϯλϦ ϯά σβΠϯ ର৅ɾ ໨త Ϗδϣϯ

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ʢ̍ʣύλʔϯͷ ࡞Γํˍ࢖͍ํ ✦ ʮ999ύλʔϯʯ͕·ͱΊΒΕ͍ͯΔͷ͸͍͍͕ɺͦΕΛͲ͏ ࢖͏͔ɺͲ͏΍ͬͯ࢖͏͔ʹ͍ͭͯཧղ͕ਂΊΒΕ͍ͯͳ͍Α͏ ʹݟड͚ΒΕΔ͕ɺզʑ͸Ͳ͏΍ͬͯ·ͱΊΒΕͨύλʔϯΛ࢖ͬ ͍͚ͯ͹Α͍ͷ͔ʁͲ͏΍ͬͯࣗ෼ͨͪͷύλʔϯΛ࡞Γ্͛ Δͷ͔ʁ

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ʢ̎ʣར༻ऀࢀՃ ✦ ઐ໳Ոʢιϑτ΢ΣΞ։ൃʹैࣄ͢ΔਓʣͷͨΊͷύλʔϯ͕ ଟ਺Λ઎ΊΔݱঢ়ͰɺύλʔϯΛ౰ࣄऀʢར༻ऀʣ͕ѻ͏ͱ͠ ͨΒͲͷΑ͏ͳܗʹͳΔ͔ʁ

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ʢ̏ʣશମੑͱηϯλʔ ✦ ιϑτ΢ΣΞͷจ຺ͩͱશମੑͱ͸ԿΛࢦ͢ͷͩΖ͏͔ʁηϯ λʔͱ͸ԿΛࢦ͢ͷͩΖ͏͔ʁ ✦ Ͳ͏΍ͬͯɺશମੑͱηϯλʔΛݟۃΊΕ͹͍͍ͩΖ͏͔ʁ

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ʢ̐ʣͲ͏׆͔͍͔ͯ͘͠ʁ ✦ ύλϯɾϥϯήʔδɺωΠνϟʔΦϒΦʔμʔΒͷΞϨάβϯμʔ ͷ͜Ε·Ͱͷي੻Λ͏͚ͯɺ͜Ε͔ΒֶͿ΂͖ɾਂԽ͍ͤͯ͞ ͖͍ͨϙΠϯτ͸ͳΜͩΖ͏͔ʁ