Vigenère Squares

a b c d e f g h i j k l m n o p q r s t u v w x y z
B C D E F G H I J K L M N O P Q R S T U V W X Y Z A
C D E F G H I J K L M N O P Q R S T U V W X Y Z A B
D E F G H I J K L M N O P Q R S T U V W X Y Z A B C
E F G H I J K L M N O P Q R S T U V W X Y Z A B C D
F G H I J K L M N O P Q R S T U V W X Y Z A B C D E
G H I J K L M N O P Q R S T U V W X Y Z A B C D E F
H I J K L M N O P Q R S T U V W X Y Z A B C D E F G
I J K L M N O P Q R S T U V W X Y Z A B C D E F G H
J K L M N O P Q R S T U V W X Y Z A B C D E F G H I
K L M N O P Q R S T U V W X Y Z A B C D E F G H I J
L M N O P Q R S T U V W X Y Z A B C D E F G H I J K
M N O P Q R S T U V W X Y Z A B C D E F G H I J K L
N O P Q R S T U V W X Y Z A B C D E F G H I J K L M
O P Q R S T U V W X Y Z A B C D E F G H I J K L M N
P Q R S T U V W X Y Z A B C D E F G H I J K L M N O
Q R S T U V W X Y Z A B C D E F G H I J K L M N O P
R S T U V W X Y Z A B C D E F G H I J K L M N O P Q
S T U V W X Y Z A B C D E F G H I J K L M N O P Q R
T U V W X Y Z A B C D E F G H I J K L M N O P Q R T
U V W X Y Z A B C D E F G H I J K L M N O P Q R T U
V W X Y Z A B C D E F G H I J K L M N O P Q R T U V
W X Y Z A B C D E F G H I J K L M N O P Q R T U V W
X Y Z A B C D E F G H I J K L M N O P Q R T U V W X
Y Z A B C D E F G H I J K L M N O P Q R T U V W X Y
Z A B C D E F G H I J K L M N O P Q R T U V W X Y Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A Vigenère Cipher is a complicated combination of Caesar Ciphers. To encipher a secret message, say meet at seven here, you first need a keyword e.g. LATER. Write out the message with the keyword written above it. Encipher each letter by finding it in the top row (red) and following that column down until it hits the row  of the keyword character (green) – e.g. L’s row for m, which intersect at X, the code. Our example would look like this:

L A T E R L A T E R L A T E R
m e e t a t s e v e n h e r e
X E X X R E S X Z V Y H X V V

So our cipher would be:

XEXXRESXZVYHXVV

Can you solve this puzzle?     Vigenère Puzzle

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