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A
 1, 2, 3, 4, 5, 6, 7, 8, 9
B
 1, 2, 3, 4, 5, 6, 7, 8, 9
C
 1, 2, 3, 4, 5, 6, 7, 8, 9
D
 1, 2, 3, 4, 5, 6, 7, 8, 9

 1, 2, 3, 4, 5, 6, 7, 8, 9

 1, 2, 3, 4, 5, 6, 7, 8, 9
E
 1, 2, 3, 4, 5, 6, 7, 8, 9
F
 1, 2, 3, 4, 5, 6, 7, 8, 9
G
 1, 2, 3, 4, 5, 6, 7, 8, 9

 1, 2, 3, 4, 5, 6, 7, 8, 9
H
 1, 2, 3, 4, 5, 6, 7, 8, 9

 1, 2, 3, 4, 5, 6, 7, 8, 9
I
 1, 2, 3, 4, 5, 6, 7, 8, 9
J
 1, 2, 3, 4, 5, 6, 7, 8, 9
K
 1, 2, 3, 4, 5, 6, 7, 8, 9
L
 1, 2, 3, 4, 5, 6, 7, 8, 9

 1, 2, 3, 4, 5, 6, 7, 8, 9
M
 1, 2, 3, 4, 5, 6, 7, 8, 9

 1, 2, 3, 4, 5, 6, 7, 8, 9

 1, 2, 3, 4, 5, 6, 7, 8, 9

5 x 5 - really easy (July 25, 2002)

No zero occurs in this puzzle.
Across:
B: A cubic number
D: All digits of D across are the same
E: D across - B across
G: M across / B down
H: the reverse of E across
I: a prime number
K: the seventh power of some number
M: the digit sum of M across equals G across
Down:
A: K across - J down
B: a prime number whose reverse is a square number
C: a palindrome
D: all digits of D down are the same
F: C down * I across
J: a palindrome
K: a prime number
L: a palindrome