At one of the parallels of the Summer Computer School, n schoolchildren go to the parade. They need to stand in order. By the command of one schoolboy, all stand in a line and start counting. The first student in the line says "first", then the second says "second" and so on. You need to write this part of the script.

Input

One number n (1 ≤ n ≤ 1000).

Output

Print the numbers from 1 to n space separated.