#include <stdio.h>
#include <stdlib.h>

int c;
int d;
int a,b;
int s, bl;

int main(int argc, char **argv) {

  while ( scanf(" %d ", &c), c != 0 ) {
    d = c % 4;
    printf("Printing order for %d pages:\n", c);
    switch ( d ) 
      {
      case 0: 
	a=c; b=1; bl=0;
	break;
      case 1:
	a=c; b=2; bl=1;
	break;
      case 2:
	a=c; b=3; bl=2;
	break;
      case 3:
	bl=1;
	break;
      } /* switch */
    
    if ( c > 4 && c%4 != 0)
      bl = (c/4+1) * 4 - c;

    s = 1; a=c; b=1; 
    while ( a >= b ) {
      if ( bl != 0 ) {
	printf("Sheet %d, front: Blank, %d\n", s, b);
	--bl; ++b;
      } else {
	printf("Sheet %d, front: %d, %d\n", s, a, b);
	--a; ++b;
      }
      if ( a >= b ) {
	if ( bl != 0 ) {
	  printf("Sheet %d, back : %d, Blank\n", s, b);
	  --bl; ++b;
	} else {
	  printf("Sheet %d, back : %d, %d\n", s, b, a);
	  --a; ++b;
	}
      }
      ++s; 
    } /* while */
    printf("\n");
  } /* while */

  return (0);
} /* main */