crypto_md5_game.js

var crypto = require('crypto')

var md5s = [
  '3bed22f7f496e84b035a996522baa759',
  '4c27c7e5718a78bfddf9012904b70eb7',
  '55d67f90c8de149ead7ee674b024f38c',
  '216642030c2d54cb1dd657dd66342c99',
  'c239f3c31fd399fc052a9b7861f2073d',
  '2b9f47811dd77fd544d570c34bf5f349',
  'd110389979571714694a5054238465ca',
  '38ba26c25fb1a32b4d0a3b93666b09b3'
]

function md5(text) {
  return crypto.createHash('md5').update(text).digest('hex')
}

var text = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890';
var pref = '';

for (var i = 0; i < 8; i++) {
  for (var j = 0; j < text.length; j++) {
    var newWord = pref + text[j];
    var temp = md5('a6307d508e9020d93273a7c086d9735f' + newWord + md5(newWord))
    if (md5s[i] == temp) {
      pref = pref + text[j]
    }
  }
}

console.log(pref)