Here it is Java Code:

import java.util.*;

class Solution{ public static void main(String[] args){ Scanner sc = new Scanner(System.in); String s = sc.nextLine(); System.out.println(got(s));

}
public static String got(String s){
     char[] ar = s.toCharArray();
    Arrays.sort(ar);

    int i =0;
    int errorcount=0;
    while(i<ar.length){
        if(i<ar.length-1 && ar[i]==ar[i+1]){
            i=i+2;
        }
        else{
            i++;
            errorcount++;
        }
    }
        if(errorcount <= 1){
            return "YES";

        }
        else{
            return "NO";
        }

}

}