#include <stdio.h>
#define STR 40
#define MAX 110

int stranky[MAX];

int pole16[STR] = {16,1,2,15,14,3,4,13,12,5,6,11,10,7,8,9};
int pole12[STR] = {12,1,2,11,10,3,4,9,8,5,6,7};
int pole8[STR] = {8,1,2,7,6,3,4,5};
int pole4[STR] = {4,1,2,3};

int i,j,kolikrat, stran, zbytek, sheet, vypis, front;

int main (void) {
    scanf(" %d", &stran);
    while (stran) {
	for (i = 0; i < MAX; i++) stranky[i] = 0;
	printf("Printing order for %d pages.\n", stran);
	kolikrat = stran / 16;
	for (i = 0; i < kolikrat; i++)
	    for (j = 0; j < 16; j++) stranky[i*16+j] = pole16[j] + 16*i;

	zbytek = stran % 16;
	if (zbytek > 12)  for (j = 0; j < 16; j++) stranky[i*16+j] = (pole16[j] + 16*i <= stran ? pole16[j] + 16*i : 0);
	else if (zbytek > 8) for (j = 0; j < 12; j++) stranky[i*16+j] = (pole12[j] + 16*i <= stran ? pole12[j] + 16*i : 0);
	else if (zbytek > 4) for (j = 0; j < 8; j++) stranky[i*16+j] = (pole8[j] + 16*i <= stran ? pole8[j] + 16*i : 0);
	else for (j = 0; j < 4; j++) stranky[i*16+j] = (pole4[j] + 16*i <= stran ? pole4[j] + 16*i : 0);	
	
	vypis = 0;
	sheet = 1;
	front = 1;
	while (stranky[vypis] || stranky[vypis+1]) {
	    if (stranky[vypis] && stranky[vypis+1]) printf("Sheet %d, %s: %d, %d\n", sheet, (front) ? "front": "back", stranky[vypis], stranky[vypis+1]);
	    else if (stranky[vypis]) printf("Sheet %d, %s: %d, Blank\n", sheet, (front) ? "front": "back", stranky[vypis]);
	    else printf("Sheet %d, %s: Blank, %d\n", sheet, (front) ? "front": "back", stranky[vypis+1]);
	    sheet++;
	    vypis +=2;
	    front = !front;	    
	}	

// vypis
//	for (i = 0; i < stran + 16; i++) printf("%d ", stranky[i]);	
	printf("\n");
	scanf("%d", &stran);
    }
    return 0;
}