19.1289 — Decoding Advanced Cryptography Solution

The letters decode as in a standard cryptogram with this key, with two tricks: In most of the text, the spaces are wrong, and in the other part, the text doesn't decode to words but rather letter sequences for you to figure out.

Key:

JYFQMWBSODTZCNVIGKEPHLARXU
ABCDEFGHIJKLMNOPQRSTUVWXYZ

Decoded text:

FINDTH ENEXTIT EMINEAC HOFTHEF OLLOWI
CPNJKU SNSYKPK SEPNSWM UICKUSC IVVIFP

NGTENC ORRECT LYSPLI TSEQUEN CESOFL
NQKSNM IXXSMK VBHTVP KHSDZSN MSHICV

ETTERS GELNDJ YWIWVW BCNOF MKGFAB
SKKSXH QSVNJA BFPFOF GMNIC ERQCWG

KLTPZYX WJLHJG ZXCVBN IRAJSB WETHEP
RVKTLBY FAVUAQ LYMOGN PXWAHG FSKUST

ABEMH ENCRYP TTHELET TERSY OUFIND
WGSEU SNMXBT KKUSVSK KSXHB IZCPNJ

ANDREA RRANGET HEENCRY PTEDL ETTERS
WNJXSW XXWNQSK USSNMXB TKSJV SKKSXH

TOGET THREEC OMMONE NGLIS HWORDS
KIQSK KUXSSM IEEINS NQVPH UFIXJH

Respaced:

FIND THE NEXT ITEM IN EACH OF THE FOLLOWING TEN CORRECTLY SPLIT SEQUENCES OF LETTERS: GELNDJ YWIWVW BCNOF MKGFAB KLTPZYX WJLHJG ZXCVBN IRAJSB WETHEP ABEMH. ENCRYPT THE LETTERS YOU FIND AND REARRANGE THE ENCRYPTED LETTERS TO GET THREE COMMON ENGLISH WORDS.

The sequences:

• GELNDJ: These are the initial letters of the first books of the Old Testament of the Bible: Genesis, Exodus, Leviticus, Numbers, Deuteronomy, Joshua. Next is Judges, a J.
• YWIWVW: These are the postal abbreviations for the last US states alphabetically, backward. YW = WY, Wyoming. IW = WI, Wisconsin. VW = WV, West Virginia. Next is Washington, WA = AW.
• BCNOF: These are atomic symbols of elements Boron, Carbon, Nitrogen, Oxygen, and Fluorine. Next is Neon, Ne.
• MKGFAB: These are star spectral classes, starting from the coolest (M). After B is O.
• KLTPZYX: This is the backward name of Mr. Mxyzptlk, a villain of Superman from another dimension who can only be sent home by tricking him into saying his name backward. The next letter is M.
• WJLHJG: ?
• ZXCVBN: These are the letters in the bottom row of a QWERTY keyboard. Next is M.
• IRAJSB: ?
• WETHEP: The preamble to the US Constitution starts with the phrase "We the people." The next letter is E.
• ABEMH: These are the letters which look like letters in the Cyrillic alphabet, in the order of that alphabet. (There is a letter similar to K before M but it has curly legs and isn't an exact match.) The next is O.

JAWNEOM?M?EO
AWFNSIE?E?SI

The provided solution only gives the solutions for the first four sequences and doesn't explain the final step, but we know the final answer that comes out of that step is ICE.