PROGRAMMING:6-4 finding integers in an array

6-4 this problem requires finding the given x from n integers. If found, the position of output x (counting from 0); If not found, output "not found".
###Input format:
The input gives two positive integers n and X in the first line, and N integers in the second line. The numbers shall not exceed long integers, separated by spaces.
###Output format:
Output the position of X in one line, or "not found".
###Input sample 1:
Here is a set of inputs. For example:
```in
5 7
3 5 7 1 9
```
###Output sample 1:
The corresponding output is given here. For example:
```out
two
```
###Input sample 2:
Here is a set of inputs. For example:
```in
5 7
3 5 8 1 9
```
###Output sample 2:
The corresponding output is given here. For example:
```out
Not Found
```






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