ébauche moving robot

import java.util.*;
import java.io.*;
import java.math.*;

/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/
class Solution {

    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        String input = in.nextLine();
        String tab[] = input.split(" ");
        String res = "";
        for(String x : tab)
        {
            if(x.equals("up"))
                res += "^ ";
            else if(x.equals("right"))
                res += "> ";
            else if(x.equals("down"))
                res+= "v ";
            else
                res += "< ";
        }
        String tab2[] = res.trim().split(" ");
        res = "";
        int count = 1;
        for(int i = 1; i < tab2.length; i++)
        {

            count = 1;
            while(i < tab2.length && tab2[i-1].equals(tab2[i]))
            {
                count++;
                i++;
            }
            res += tab2[i-1];
            if(count != 1)
                res+=count;
        }
        if(!tab[tab.length-1].equals(tab[tab.length-2]))
            //res+=tab2[tab2.length-1];
        System.out.println(res.trim());
    }
}