Input Format
The first line contains an integer .
Constraints
Output Format
Print the list of integers from through as a string, without spaces.
Sample Input 0
3
Sample Output 0
123#if __name__ == '__main__':
n = int(input())
for i in range(1,n+1):
print(i,end="")
pro
print(*range(1, int(input())+1), sep='')