Can someone help me decipher this ciphertext. There are 2 alphabets in use. Apparently its a polyalphabetic affine cipher however I think its's a vigenire cipher I don't know for sure.
SIKAW CGRBG FRDFJ NDQVE MTDRS IGOMA APMER UQEAB JVJDX QSAWC OUJPV UREAA REVUW XZIWU GEWRB MOUJP ABDER HQKBT XRJPD QPUFX YTJFY XDIMU WCVUR ETUJQ AOWPX XABDK TIREJ GOUVQ JVFVV OVTDG AAWCT RJDAU WEWUA PBUOA NDBRA BDFDO GEQIY UDQAU JPAIT YSAYA WCABD AQIQW VPSEZ MBOMF QUPIM UWCVA YEJVY PSEWQ FFYEW XZMXP SQSUF PVIWF TOQQD QOUJR YPSEK EVQDX HAMXJ VZMSU QEVAV PDFJV DOURI RUWCV PABDT QAEEV GQEPG QoXQX VNPSO VPSEG AQIAE VMBOM FNRJF FIMXZ CDPAU NEABD RJQRI MXIXD EAUIP SEIIV PDQAI WFOEV PVIXX XVNND QVEMQ JWBVN PSEXR GRXJD QJVYA WGQEJ QDPSE XRTRD TEVUI RDVYE ENBOV PSEVE SIYPB HDMXP SAWEJ QZQJA MAWCY AVPJV TEBDB VDUQW BRDRD CFXJR ARJFD RBOAE VIWFJ PABDQ JWDPX WDBJF AUOEX VVURE LOXEA QGUAO WXXYD XZPBH DNXQX PDFOK VPQIW CDGQI IPJVY HDQXF DQOEX VNQSE MPDRD FIRBW VPBRR QROVP SIKEJ QFAAI OXDHD ITBBV PBXGS PSEXR KEVOD BDABD HFGTI WEDRV MJQJP AUQPF CJUQP FRAXD AVXJV YIVWJ XMAVX JVYXZ AWCBD IPSEP EVPTU JQAUI BXQGI WABXJ BDRDA WPSEX RRUVP GAGAW CYIZQ IXBOQ AVBDF JHFGT IWEDR QEGOO XXGPB DRDPS EVEJW DVRIY EABDA QUPVM IPQJV YGFXA AKIAE YPSEM IWFIU QQFCJ RTIWE JVYKJ WVUTG JQXUW IMXZP SEVTJ DQRIM XQEGO OXXGO OAQBU WEQUQ XJPDR ABDHF GTIWE DRVMB OMFOE OITYB VTEJC JAWAW TBQVE VQXUW PSEII KUFRX PDIWF RUVPI XBOQA VBXVN BDIYS FIQPD RVUIP SEPEV PXVYA JTXRJ PDQPI VIAVD MGRBN BDBDI YSFIQ PDRVU IPSUV EPUQP SKYEV GDVYI WPVUI PSEGA QIAEV PSEOU BPMEN CDRVM SUIRB WABDU SIKAW CGRBG FRDFJ NDQVE MTDRS IGOMA APMER UQEAB JVJDX QSAWC OUJPV UREAA REVUW XZIWU GEWRB MOUJP ABDER HQKBT XRJPD QPUFX YTJFY XDIMU WCVUR ETUJQ AOWPX XABDK TIREJ GOUVQ JVFVV OVTDG AAWCT RJDAU WEWUA PBUOA NDBRA BDFDO GEQIY UDQAU JPAIT YSAYA WCABD AQIQW VPSEZ MBOMF QUPIM UWCVA YEJVY PSEWQ FFYEW XZMXP SQSUF PVIWF TOQQD QOUJR YPSEK EVQDX HAMXJ VZMSU QEVAV PDFJV DOURI RUWCV PABDT QAEEV GQEPG QoXQX VNPSO VPSEG AQIAE VMBOM FNRJF FIMXZ CDPAU NEABD RJQRI MXIXD EAUIP SEIIV PDQAI WFOEV PVIXX XVNND QVEMQ JWBVN PSEXR GRXJD QJVYA WGQEJ QDPSE XRTRD TEVUI RDVYE ENBOV PSEVE SIYPB HDMXP SAWEJ QZQJA MAWCY AVPJV TEBDB VDUQW BRDRD CFXJR ARJFD RBOAE VIWFJ PABDQ JWDPX WDBJF AUOEX VVURE LOXEA QGUAO WXXYD XZPBH DNXQX PDFOK VPQIW CDGQI IPJVY HDQXF DQOEX VNQSE MPDRD FIRBW VPBRR QROVP SIKEJ QFAAI OXDHD ITBBV PBXGS PSEXR KEVOD BDABD HFGTI WEDRV MJQJP AUQPF CJUQP FRAXD AVXJV YIVWJ XMAVX JVYXZ AWCBD IPSEP EVPTU JQAUI BXQGI WABXJ BDRDA WPSEX RRUVP GAGAW CYIZQ IXBOQ AVBDF JHFGT IWEDR QEGOO XXGPB DRDPS EVEJW DVRIY EABDA QUPVM IPQJV YGFXA AKIAE YPSEM IWFIU QQFCJ RTIWE JVYKJ WVUTG JQXUW IMXZP SEVTJ DQRIM XQEGO OXXGO OAQBU WEQUQ XJPDR ABDHF GTIWE DRVMB OMFOE OITYB VTEJC JAWAW TBQVE VQXUW PSEII KUFRX PDIWF RUVPI XBOQA VBXVN BDIYS FIQPD RVUIP SEPEV PXVYA JTXRJ PDQPI VIAVD MGRBN BDBDI YSFIQ PDRVU IPSUV EPUQP SKYEV GDVYI WPVUI PSEGA QIAEV PSEOU BPMEN CDRVM SUIRB WABDU
