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pending

Have you ever noticed that \(0\), \(6\), \(8\) and \(9\) have *holes* in them?

An interesting problem is to count such holes in a given number.

For example, the number \(68724\) and \(59013\) have \(3\) and \(2\) holes respectively.

Counting the *holes* in relatively small numbers are pretty easy, but how about finding the *holes* in a 500 digits number?

How many *holes* are there in the 500-digits number?

You can find the number here.

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