CF1513C Add One

You are given an integer $ n $ . You have to apply $ m $ operations to it. In a single operation, you must replace every digit $ d $ of the number with the decimal representation of integer $ d + 1 $ . For example, $ 1912 $ becomes $ 21023 $ after applying the operation once. You have to find the length of $ n $ after applying $ m $ operations. Since the answer can be very large, print it modulo $ 10^9+7 $ .

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For the first test, $ 1912 $ becomes $ 21023 $ after $ 1 $ operation which is of length $ 5 $ . For the second test, $ 5 $ becomes $ 21 $ after $ 6 $ operations which is of length $ 2 $ . For the third test, $ 999 $ becomes $ 101010 $ after $ 1 $ operation which is of length $ 6 $ . For the fourth test, $ 88 $ becomes $ 1010 $ after $ 2 $ operations which is of length $ 4 $ .