In a six digit (or larger) number, locate the greatest sequence of five consecutive digits found within the number given.

Example

In the following 10 digit number:
1234567890
67890 is the greatest sequence of 5 consecutive digits.

Tests

digit5(7316717)
digit5(1234567898765)

This challenge comes from jhoffner on CodeWars. Thank you to CodeWars, who has licensed redistribution of this challenge under the 2-Clause BSD License!

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