Правилни реченици

import java.util.Scanner;

public class PravilnaRecenicaLista {
    public static void preuredi(SLL<Character> list){
           SLLNode<Character> tmp=list.getFirst();

           while(tmp!=null){
               SLLNode<Character> zacuvaj=tmp;

               while(tmp.succ.element!=' ' && tmp.succ.element!='.'){
                   tmp=tmp.succ;
               }

               list.insertBefore(tmp.element,zacuvaj);
               SLLNode<Character> kopija=tmp;
               list.delete(tmp);
               tmp=kopija.succ;

               if(tmp.element==' ')
                   tmp=tmp.succ;

               if(tmp.element=='.'){
                   System.out.println(list);
                   return;
               }
           }
    }
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        SLL<Character> list=new SLL<>();

        String line=in.nextLine();
        for(int i=0;i<line.length();i++){
            list.insertLast(line.charAt(i));
        }
        preuredi(list);
    }
}