#include <stdio.h>

int main(void)
{
	int x;
	int sh, sn;
	int f, b;
	int ft, bt;

	while (1) {
		scanf("%d",&x);
		if (x == 0) break;

		printf("Printing order for %d pages:\n",x);
		
		sn = (x + 3) / 4;
		f = 1;
		b = sn*4;

		for (sh = 1; sh <= sn; sh++) {
			ft = f <= x;
			bt = b <= x;
			if (ft || bt) {
				printf("Sheet %d, front: ",sh);
				if (bt) 
					printf("%d, ",b);
				else
					printf("Blank, ");
				
				if (ft) 
					printf("%d\n",f);
				else
					printf("Blank\n");
			}
			
			f++;
			b--;

			ft = f <= x;
			bt = b <= x;
			if (ft || bt) {
				printf("Sheet %d, back : ",sh);
				if (ft) 
					printf("%d, ",f);
				else
					printf("Blank, ");
				
				if (bt) 
					printf("%d\n",b);
				else
					printf("Blank\n");
			}
			
			f++;
			b--;
			
		}

		putchar('\n');
	}
	
	return 0;
}