public String caesar(String w, int s)
{
    String alpha = "abcdefghijklmnopqrstuvwxyz";
    alpha += alpha.toUpperCase() + " ";
    String newword = "";
    char c;
    for (int i = 0; i < w.length(); i++)
    {
           c = w.charAt(i);
           System.out.println(c);
           c = s > 0 ? alpha.charAt((alpha.indexOf(c)+s)%53):(alpha.indexOf(c)+s%53)>=0?alpha.charAt((alpha.indexOf(c)+s%53)):alpha.charAt((52+(s+alpha.indexOf(c)+1)%53));
           newword = newword + c;
    }
    return newword;
}