function buildTable() {
  keyboard = [
    'QWERTYUIOPqwertyuiop',
    'ASDFGHJKLasdfghjkl',
    'ZXCVBNMzxcvbnm',
  ]
  var table = {}
  for (var row = 0; row < keyboard.length; row++) {
    for (var col = 0; col < keyboard[row].length; col++) {
      table[keyboard[row][col]] = row
    }
  }
  return table
}

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

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