#include <stdio.h>
int n;

void cislo(int a) {
  if (a<=n)
    printf("%d", a);
  else
    printf("Blank");
}

void alg() {
  printf("Printing order for %d pages:\n", n);
  int a, b, c, d;
  a=((n+3)/4)*4;
  b=1;
  c=2;
  d=a-1;
  
  int p=a/4;
    
  for (int i=1; i<=p; i++) {
    printf("Sheet %d, front: ", i);
    cislo(a);
    printf(", ");
    cislo(b);
    printf("\n");
    
    if (c<=n || d<=n) {
      printf("Sheet %d, back: ", i);
      cislo(c);
      printf(", ");
      cislo(d);
      printf("\n");
    }

    a-=2;
    b+=2;
    c+=2;
    d-=2;
  }
  
}

int main() {
  scanf("%d", &n);
  while (n!=0) {
    alg();
    scanf("%d", &n);
  }
  return 0;
}