code: function(Se){// Shortcuts
  var ke=this.words,Ie=Se.words,Ae=this.sigBytes,we=Se.sigBytes;// Clamp excess bits
  // Concat
  if(this.clamp(),Ae%4)// Copy one byte at a time
  for(var Ee=0,Pe;Ee<we;Ee++)Pe=255&Ie[Ee>>>2]>>>24-8*(Ee%4),ke[Ae+Ee>>>2]|=Pe<<24-8*((Ae+Ee)%4);else// Copy one word at a time
  for(var Ee=0;Ee<we;Ee+=4)ke[Ae+Ee>>>2]=Ie[Ee>>>2];// Chainable
  return this.sigBytes+=we,this}
docs: Concatenates a word array to this word array.
  
  @param {WordArray} wordArray The word array to append.
  
  @return {WordArray} This word array.
  
  @example
  
  wordArray1.concat(wordArray2);