for(int i=0;i<letters.getNumberOfLetters();i++)
{
char c =letters.getLetter(i).getName();
String s= ""+ c;
if(node.contains(s)){
GADDAGNode newNode = node.getChild(c);
Letter l=letters.getLetter(i);
letters.removeLetter(l);
GoOn(posRelative, posAbs,s, word,letters, newNode, node);
letters.addLetter(l);
}