#pragma GCC optimize("Ofast,fast-math,unroll-loops,no-stack-protector")
#include <stdio.h>
#include <stdlib.h>
int cmp(const void*x,const void*y){return ((int*)x)[1]-((int*)y)[1];}
int l[25][8],a[200][2],n,i=0,j,p[8]={3,4,2,5,1,6,0,7},pa=0;float f;
int main(){
 for(scanf("%d",&n);i<n;a[i][1]=(int)(f*100),++i)scanf("%d %f",&a[i][0],&f);
 qsort(a,n,8,cmp);
 for(n>>=3,i=0;i>>3<n;){
  for(j=0;j<n;++i,++j)l[j][p[i/n]]=a[pa++][0];
  for(;j--;++i)l[j][p[i/n]]=a[pa++][0];
 }
 for(i=0;i<n;++i){printf("%d",i+1);for(j=0;j<8;++j)printf(" %d",l[i][j]);putchar('\n');}
 return 0;
}

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MTYKMSAxMC44MAoyIDEwLjM1CjMgMTAuMDIKNCAxMC40NAo1IDExLjMyCjYgMDkuOTMKNyAxMS41Mgo4IDExLjUzCjkgMTIuMzQKMTAgMTEuNDIKMTEgMTAuMzIKMTIgMTAuMjgKMTMgMTIuMjEKMTQgMTIuNTQKMTUgMTIuMjYKMTYgMTMuNDA=

16
1 10.80
2 10.35
3 10.02
4 10.44
5 11.32
6 09.93
7 11.52
8 11.53
9 12.34
10 11.42
11 10.32
12 10.28
13 12.21
14 12.54
15 12.26
16 13.40