In the land of the green glass door there are riddles but no answers, sheets but no blankets, and books but no words. Name something found in the land of the green glass door.

Common Wrong Answers
“Answers”
Answers cannot exist in the land of the green glass door, as the riddle specifies that there are riddles but no answers.
“Blankets”
Blankets are explicitly excluded from the land of the green glass door, as noted in the riddle, which states there are sheets but no blankets.
“Words”
Words cannot be found in the land of the green glass door, as the riddle mentions there are books but no words.
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