function buildTable() {
  keyboard = [
    'QWERTYUIOPqwertyuiop'.split(''),
    'ASDFGHJKLasdfghjkl'.split(''),
    'ZXCVBNMzxcvbnm'.split(''),
  ];
  var table = {};
  for (var i = 0; i < 3; i++) {
    keyboard[i].forEach(function(e) {
      table[e] = i;
    });
  }
  return table;
}

function check(table, str) {
  freq = [0, 0, 0];
  str = str.split('');
  str.forEach(function(e) {
    freq[table[e]]++;
  });
  var num_zeroes = 0;
  freq.forEach(function(e) {
    num_zeroes += (freq[e] == 0);
  });
  return num_zeroes == 2;
}

var table = buildTable();
inputs = ['Alaska', 'dad', 'hello',];
inputs.forEach(function(e) {
  if (check(table, e)) console.log(e);
});