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When you divide by 3, you get remainder 0 or 1 or 2. If it 0, we can have a stirng of all 5's. If the remainder is 1, then if you subtract 10 ( which is 3 * 3 + 1) then the number is divisible by 3 -- however, number should be atleast 10. If remainer is 2, then if you subtract 5 (which is 3 *1 + 2) then the number is divisible by 3 -- however number should be at least 5. Otherwise, print -1.

## Sherlock and The Beast

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My solution in python 3:

When you divide by 3, you get remainder 0 or 1 or 2. If it 0, we can have a stirng of all 5's. If the remainder is 1, then if you subtract 10 ( which is 3 * 3 + 1) then the number is divisible by 3 -- however, number should be atleast 10. If remainer is 2, then if you subtract 5 (which is 3 *1 + 2) then the number is divisible by 3 -- however number should be at least 5. Otherwise, print -1.

lovely!