#include 
     
      #include 
      
       int a[100001];int comp(const void*a,const void*b){    return *((int *)a)-*((int *)b);}int main(){    int n,m,i;    scanf("%d %d",&n,&m);    for(i=0;i
       
        =m)break;    int p=0,q=i-1;    while(p
        
         <=q)    {        while(q
         
          
           =q) printf("No Solution\n"); else printf("%d %d",a[p],a[q]); return 0;}