Write a program to answer this question. Given two integers M and N (1 <= M <= N <= 2,000,000,000 and N-M <= 500,000), how many of occurences of each digit appear?

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Write a program to answer this question. Given two integers M and N (1 <= M <= N <= 2,000,000,000 and N-M <= 500,000), how many of occurrences of each digit appear?