Today, Shizuka is having her birthday and decided to throw a big party. She invited all of her friends mainly nobita and degisuki.
So, after party has been over, she decided to distribute the sweets of different sweetness (1,2,3,......, N} only to her best friends Nobita and Degisuki.
She has to keep one thing in mind that will choosing sweets if she gives set A chocolate to Nobita, then she selects another subset B such that A is not a subset of B and B is not a
subset of A for degisuki.
So, help her to calculate total number of ways to distribute toffees to Nobita and Degisuki. Since answer can be large output the result mod 10^9+7.
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97
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