~cpp

#include <iostream>

using namespace std;

int main(void)
{	

	int num;
	
	cin >> num;
	
	if (num >= 1 && num <= 10) {
		
		for (int i = 1; i <= num; i++) {
			
			if (i == 5) continue;
			
			cout << i;
		
		}
	
	}
	
	return 0;

}