It's written in base 6, but skips any number that has a zero in it.11 = A12 = B13 = C14 = D15 = E21 = F22 = G...It saysTHEYRE GONETHEYRE GONETHEYRE GONETHEYRE GONETHEYRE GONEIMUSTKEEPHERSAFE!
Additional note. He leaves out the letter J. It should be 25, but he skips straight to 25 = K.
hEeEe SsAffEtYYYou CaAnT bEee SaFeEe
you can be plenty safe from proxies, its called a gun or knife. he may be invincible but you sure aren't