int range = (b-a)+1;
            int limit = (range-x)+1;
            int[] arr = new int[x];
            int start=a;
            for(int i=0;i<limit;i++){
                
                int inside = start;
                
                for(int j=0;j<x;j++){
                    arr[j] = inside;
                    inside++;
                }
                int check = arr[0]*2;
                if(arr[x-1]>=check && arr.length==range ){
                    int ans = -1;
                    System.out.print(ans);
                    break;
                }else if(arr[x-1]<check){
                    for(int k=0;k<x;k++){ 
                        System.out.print(arr[k]+" ");
                    }
                System.out.println("");
                break;    
                }
                    
                start++;    
   
                }