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var date = new Date()
var letterArray = ['q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'z', 'x', 'c', 'v', 'b', 'n', 'm', '_', '@', '#', '.', '?']
var formatObj = {
  y: date.getFullYear(),
  m: date.getMonth() + 1,
  d: date.getDate()
}
var newPassword = letterArray[formatObj.y % 31] + letterArray[formatObj.m] + letterArray[formatObj.d - 1] + (formatObj.y * 2 + formatObj.m * 3 + formatObj.d * 4);
document.write('<h1>'+newPassword+'</h1>')
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