"Look at the spacing," she said. "If you shift the 'upx' by three, you get 'rsu'—the old Riverside Station Underpass." Elias felt the familiar jolt of adrenaline. The
Likely not a simple substitution of English. thmyl mtsfh upx mhkr
t → s h → g m → l y → x l → k → "sglxk" — no, maybe not. "Look at the spacing," she said