#include<stdio.h>
main()
{
	char fin[100], fout[100];
	for(int t = 1 ; t <= 5 ; t++ )
	{
		sprintf(fin,".%d.in",t);
		sprintf(fout,".%d.out",t);
		freopen(fin,"r",stdin);
		freopen(fout,"w",stdout);
		int n, m, a, b;
		scanf("%d", &n);
        for( a = 1 ; a <= n ; a++ )
            if( a % 3 == 0 ) printf("X ");
            else printf("%d ", a);
    }
}