CF -- 414A

 #include<iostream>
 #include<cstdio>
 #include<cstring>
 using namespace std;
 int main(){
     int n,k;
     while(~scanf("%d%d",&n,&k)){
         if(n ==  &&  k >  || k < n / ) printf("-1\n");
         else if(n ==  && k == ) printf("1\n");
         else{
             if(k == n/){
                 for(int i = ;i < n;i ++) printf("%d ",i);
                 printf("%d\n",n);
             }else{
                 int tmp = k - n/ + ;
                 printf("%d %d",tmp,*tmp);
                 for(int i = tmp* + ;i < tmp * + n - ;i ++) printf(" %d",i);
                 printf("\n");
             }
         }
     }
     return ;
 }