Cryptography 200: hertz 2

Yln mvsfi ugbxe abj tvkow bcng yln qrzd pbh. S fre'y unqsncn ylsw sw wvfl re nrwd ogbuqnk se Osfb. Sy'w rqkbwy rw sa S wbqcnp r ogbuqnk rqgnrpd! Bird, asen. Lngn'w yln aqrh: osfbFYA{wvuwysyvysbe_fsolngw_rgn_ybb_nrwd_whwhyeosub}

The quick brown fox jumps over the lazy dog. I can't believe this is such an easy problem in Pico. It's almost as if I solved a problem already! Okay, fine. Here's the flag: picoCTF{substitution_ciphers_are_too_easy_sgsgtnpibo}