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Quick Summary
Rearrange string characters to form the lexicographically smallest palindrome.
Use character frequencies to determine valid placements for each letter.
Place the smallest characters at the outer edges and the smallest odd-frequency character in the center.
What This Tests
Character frequency analysis
Greedy algorithm design
Palindrome symmetry properties
Lexicographical ordering strategies
Common Patterns
Greedy
Hashing
Sorting
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Hint 2
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Python3
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