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The included code stub will read an integer, $n$, from STDIN.

Without using any string methods, try to print the following:

$123\cdots n$

Note that "$\bullet\bullet\bullet\bullet$" represents the consecutive values in between.

Example

$n=5$

Print the string $12345$.

Input Format

The first line contains an integer $n$.

Constraints

$1\leq n\leq150$

Output Format

Print the list of integers from $\mbox{1}$ through $n$ as a string, without spaces.

Sample Input 0
3

Sample Output 0
123

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