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You are given a positive integer ‘N’. Your task is to print all prime numbers less than or equal to N.

Note: A prime number is a natural number that is divisible only by 1 and itself. Example - 2, 3, 17, etc.

You can assume that the value of N will always be greater than 1. So, the answer will always exist.

Detailed explanation

```
2 <= N <= 10^7
Where ‘N’ is the given positive integer.
Time Limit: 1sec
```

```
7
```

```
2 3 5 7
```

```
For the given input, all prime numbers from 2 to 7 are 2, 3, 5 and 7.
```

```
30
```

```
2 3 5 7 11 13 17 19 23 29
```