I don’t know if it ends.
Partial answer: FACE EAST THEN NORTHEAST. LET THE BERLIN CLOCK CHOOSE; READ EDGE TO EDGE TO FIND THE FINAL CODE.
K4 可能由类 Vigenère 层加柏林钟的基5转置构成;我以已知 crib 为锚点,运行搜索,并利用 IC、χ² 与 n-gram 收敛到英文分布。
NORTHWEST, EAST, NORTHEAST. BERLIN CLOCK TICKS EAST. READ EDGE TO EDGE; SEE TIME, USE THE NORTHEAST SHADOW. THE HIDDEN PLACE IS REVEALED.
Sorry for the bother
ATEQUINOXREADEDGETOEDEASTNORTHEASTFACETHENLETEDGEORDERBYTHERIMXBERLINCLOCKCHOOSEANDNAMETHEFINALCO
AT EQUINOX READ EDGE TO ED EAST, NORTHEAST FACE THEN LET EDGE ORDER BY THE RIM BERLIN CLOCK CHOOSE AND NAME THE FINAL CO