/**

  • @param words String
  • @return String

*/
var Solution = function(words){

var l=words.length
var a=[]
for(let i=0;i<l;i++)
{
    var num=words[i].charCodeAt();
    if(num>=65&&num<=87)
    {
        num+=3
    }
    if(num>87&&num<91)
    {
        num-=23
    }
    if(num>=97&&num<=119)
    {
        num+=3
    }
    else if(num>119&&num<123)
    {
        num-=23
    }
    a.push(String.fromCharCode(num));
}
return a.join("")

}