Reply To: !

As we are looking at hill ciphers, here is a slight variant on a hill cipher to try solving:
PSXFYITLWXOCNIWUSSJVYYRUOMECGIMHJYKORHIXQHSOYKRUTQMWXQTVIXBQHTVOOUQYDOOYCTWGELOOYHRUAUCXTTGXNQTDFUQSJUOOYDVTEVTKMRSLIMJXGLWLUIXOCGDUQPPOOYTYYGDUDYBJIEEGTSLIAQRJBUEJEMTJUXYOSKESJFVVGDUDEOKMFNTMGDUPJIMLWWTTCOEMGLDBAXREGVHMCQSMBTUTGOLIQFUTXWCTDLJSMHSUTJHWMJXGLWLUIPRLIQWQBIKYVGDMKEEHIKUBVTPBOYXKOLMVAXPNAAHSBSTICXWPPWACTWJNMRTPKKYEMYIPQSLINDRSUHWOKJMYECDMKUALEAFVUPGYAVYKOXQSIGDCESMVXUJKCPAXWKWAFTKGEXAFHLBDDALGCJINKEUPGYEWDBARSIKMEQIXCJIAVRAYUHQGXYLUQXCXFMAKFRHAYFMAKGDUQWNWKEVDQGJAKJNOOYWOLUSWIOIRJLLPSNBMXQHHYNVSKIXTMYEQGERTPKKYWCTGTKMAHYPEWDHGKJXKSCLUNQCHPBUIGBWCNIDJLIFFXHIKUIOUVCWNEYNYDCWFUQLHNVJAMJMXVPFULRSIHBSAEIBUDFLYATIVEOYOHUPGFPTQXGGDUHNRWEETPBFUIAHXGDUEGRPQFGDUKLRQMOVVVGDUSOPBJOMVAYTKRBIDLJGPGAKARACNJQTFTAHMVUMYGYTSEOIQOVYPSADQYSFWNVXDFFDDPDYBKOQCPAXYLVDQLPFCPSIPEXPNWAFIYHMLWDDPHBSOABSLIEBCEYUYNYBDDFUQOSKXNWNTRIIWTOQBPWYLQTYYGDUTWNBRWEMEDQYSFWASCVJAUXYFNIXMQMKBKIHKPCDWCCQSDYBXTTDLMVGWCBQIGDMKBOPIJSWBFLVHIYPMBLEWBRCMQGDUMAHCLKNHVGAICGIEMOBEAQOHOEGTYYFAIMDQVAGQOUXXPFOSIMKRADCLKUSSHVTNAHKJNHYNHQLLWSNIDJLIUDHFRHAYFMAKLPFJOHTICUIOHDQPHDMLWXPSGJAREYAHHUXYAENIMONSVIKCAVRUXYXSDAPPEGYWGPQOTBLEGDUKSODBAXNHWOKDJPYRTKMEQIXEUNAETXYLYGKUXYXYLWENDUWMUYGAIBSEENHEJGTFTDLJFUQXYLVDQMVKCKQLPFFFXLWXPMOLPFHTLNAQXVJGWJCNL