Need help!!!

Use table to guess the first character of the key used to generate the ciphertext.

Key Length is 8.

OUYGULYTKKUKKKHNCQPOKXGKUVOISJKEJOMJNUOUYKOKKGXJGUYTVKTURKEJKHZYEKKKOKSRTLIOEUKGZCOYJGOKGKZKZJNGKGSOKENTPLMZNGS

Thank you...

. The most common letters in the English languagei order) are "etaoinshr". When a shift is applied, these appear in the following order 0aetaoinshr 1bfubpjotis 2cgvcqkpujt 3 -dhwdrlqvku 4eixesmrwlv 5--f-jyftnsxmw 6-g-- kzguotynx 7-h -- 1ahvpuzoy 8imbiwqvapz 13rgnbvafue 14shocubgvf 15 -- p tipdxchug 16qujqeydixh 17 --r-- vkrizejy 18wlsgafkzj 19txmthbglak 20uynuichmbl 21 -- v -- zovjdin 22w apukejodn 10-kodkysxcrb -pelztydsc 12qfmauzetd 23xbqxlfkpeo 24 y crymglqfp 25z dsznhmrg