process.stdin.resume();
process.stdin.setEncoding('ascii');

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
    input_stdin += data;
});

process.stdin.on('end', function () {
    input_stdin_array = input_stdin.split("\n");
    main();    
});

function readLine() {
    return input_stdin_array[input_currentline++];
}

/////////////// ignore above this line ////////////////////

function make_lena(n) {
  var arr = new Array(n);

  var fi = 0; // first index
  var li = n -1; // last index

  if (n % 2) {
    for (var i = n; i > 0; --i) {
      if (i % 2 === 0) {
        arr[fi++] = i;
      } else {
        arr[li--] = i;
      }
    }
  } else {
    for (var i = n; i > 0; --i) {
      arr[i - 1] = i;
    }
  }

  return arr;
}

function lena_sort(nums, data) {
  if (nums.length <= 1) {
    return nums;
  }

  var pivot = nums[0];
  var less = [];
  var more = [];

  for (var i = 1; i < nums.length; ++i) {
    if (++data[0] > data[1]) {
      return -1;
    }
    if (nums[i] < pivot) {
      less.push(nums[i]);
    } else {
      more.push(nums[i]);
    }
  }

  var sorted_less = lena_sort(less, data);
  var sorted_more = lena_sort(more, data);


  return data[0] === data[1] ? nums : -1;
}


function main() {
    var q = parseInt(readLine());
    for(var a0 = 0; a0 < q; a0++){
      var len_temp = readLine().split(' ');
      var len = parseInt(len_temp[0]);
      var c = parseInt(len_temp[1]);
      var r = lena_sort(make_lena(len), [0, c]);
      
      console.log(Array.isArray(r) ? r.join(' ') : r);
    }

}