There are 2 solutions. The longest is XOXOX with 5 letters, and the shortest is XOXO with 4 letters.
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No, "HUGS AND KISSES, IN LETTERS" hasn´t seen a spike right now. Solvers are most interested in: Tropical tree, Competitions, Standard, Erase and Gatherer.
Solutions are between 4 and 5 letters long.