13. Print a Repeated Pattern

I'm a slow walker, but I never walk backwards.

Task Description

Write a program to read a positive integer $n$, then go through $n$ phases. During the $i$-th phase, the program will print an integer sequence from 1 to $i$.

Input Format

There is one line in the input. The first line has the integer $n$.

Output Format

There is one line in the output according to the description.

Sample Input

5

Sample Output

112123123412345

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