import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {
    char[] cs;

    public static void main(String args[]) {
        new Main().run();
    }

    void run() {
        FastReader sc = new FastReader();
        cs = sc.next().toCharArray();
        solve();
    }

    void solve() {
        boolean[] odds = new boolean[26];
        for (int i = 0; i < cs.length; i++) {
            if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            }
        }
        boolean flag = true;
        for (int i = 0; i < odds.length; i++) {
            if (odds[i]) {
                flag = false;
                break;
            }
        }
        if (flag) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }

    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt()
        {
            return Integer.parseInt(next());
        }

        long nextLong()
        {
            return Long.parseLong(next());
        }

        double nextDouble()
        {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
        }
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.util.StringTokenizer; StringTokenizer java.util public class Main {
    char[] cs;

    public static void main(String args[]) {
        new Main().run();
    }

    void run() {
        FastReader sc = new FastReader();
        cs = sc.next().toCharArray();
        solve();
    }

    void solve() {
        boolean[] odds = new boolean[26];
        for (int i = 0; i < cs.length; i++) {
            if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            }
        }
        boolean flag = true;
        for (int i = 0; i < odds.length; i++) {
            if (odds[i]) {
                flag = false;
                break;
            }
        }
        if (flag) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }

    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt()
        {
            return Integer.parseInt(next());
        }

        long nextLong()
        {
            return Long.parseLong(next());
        }

        double nextDouble()
        {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
        }
    }
} Main char[] cs; cs public static void main(String args[]) {
        new Main().run();
    } main {
        new Main().run();
    } new Main().run() new Main().run new Main() String args[] args void run() {
        FastReader sc = new FastReader();
        cs = sc.next().toCharArray();
        solve();
    } run {
        FastReader sc = new FastReader();
        cs = sc.next().toCharArray();
        solve();
    } FastReader sc = new FastReader(); sc new FastReader() cs = sc.next().toCharArray() cs sc.next().toCharArray() sc.next().toCharArray sc.next() sc.next sc solve() solve void solve() {
        boolean[] odds = new boolean[26];
        for (int i = 0; i < cs.length; i++) {
            if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            }
        }
        boolean flag = true;
        for (int i = 0; i < odds.length; i++) {
            if (odds[i]) {
                flag = false;
                break;
            }
        }
        if (flag) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } solve {
        boolean[] odds = new boolean[26];
        for (int i = 0; i < cs.length; i++) {
            if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            }
        }
        boolean flag = true;
        for (int i = 0; i < odds.length; i++) {
            if (odds[i]) {
                flag = false;
                break;
            }
        }
        if (flag) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } boolean[] odds = new boolean[26]; odds new boolean[26] 26 for (int i = 0; i < cs.length; i++) {
            if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            }
        } int i = 0; int i = 0; i 0 i < cs.length i cs.length cs cs.length i++ i++ i {
            if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            }
        } {
            if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            }
        } if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            } !odds[cs[i] - 'a'] odds[cs[i] - 'a'] odds cs[i] - 'a' cs[i] cs i 'a' {
                odds[cs[i] - 'a'] = true;
            } odds[cs[i] - 'a'] = true odds[cs[i] - 'a'] odds cs[i] - 'a' cs[i] cs i 'a' true {
                odds[cs[i] - 'a'] = false;
            } odds[cs[i] - 'a'] = false odds[cs[i] - 'a'] odds cs[i] - 'a' cs[i] cs i 'a' false boolean flag = true; flag true for (int i = 0; i < odds.length; i++) {
            if (odds[i]) {
                flag = false;
                break;
            }
        } int i = 0; int i = 0; i 0 i < odds.length i odds.length odds odds.length i++ i++ i {
            if (odds[i]) {
                flag = false;
                break;
            }
        } {
            if (odds[i]) {
                flag = false;
                break;
            }
        } if (odds[i]) {
                flag = false;
                break;
            } odds[i] odds i {
                flag = false;
                break;
            } flag = false flag false break; if (flag) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } flag {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt()
        {
            return Integer.parseInt(next());
        }

        long nextLong()
        {
            return Long.parseLong(next());
        }

        double nextDouble()
        {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
        }
    } FastReader BufferedReader br; br StringTokenizer st; st public FastReader() {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        } FastReader {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        } br = new BufferedReader(new
                    InputStreamReader(System.in)) br new BufferedReader(new
                    InputStreamReader(System.in)) String next() {
            while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        } next {
            while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        } while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            } st == null || !st.hasMoreElements() st == null st null !st.hasMoreElements() st.hasMoreElements() st.hasMoreElements st {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            } try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                } catch (IOException e)
                {
                    e.printStackTrace();
                } IOException e {
                    e.printStackTrace();
                } e.printStackTrace() e.printStackTrace e {
                    st = new StringTokenizer(br.readLine());
                } st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) return st.nextToken(); st.nextToken() st.nextToken st int nextInt()
        {
            return Integer.parseInt(next());
        } nextInt {
            return Integer.parseInt(next());
        } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next long nextLong()
        {
            return Long.parseLong(next());
        } nextLong {
            return Long.parseLong(next());
        } return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next double nextDouble()
        {
            return Double.parseDouble(next());
        } nextDouble {
            return Double.parseDouble(next());
        } return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next String nextLine() {
            String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
        } nextLine {
            String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
        } String str = ""; str "" try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            } catch (IOException e)
            {
                e.printStackTrace();
            } IOException e {
                e.printStackTrace();
            } e.printStackTrace() e.printStackTrace e {
                str = br.readLine();
            } str = br.readLine() str br.readLine() br.readLine br return str; str public class Main {
    char[] cs;

    public static void main(String args[]) {
        new Main().run();
    }

    void run() {
        FastReader sc = new FastReader();
        cs = sc.next().toCharArray();
        solve();
    }

    void solve() {
        boolean[] odds = new boolean[26];
        for (int i = 0; i < cs.length; i++) {
            if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            }
        }
        boolean flag = true;
        for (int i = 0; i < odds.length; i++) {
            if (odds[i]) {
                flag = false;
                break;
            }
        }
        if (flag) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }

    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt()
        {
            return Integer.parseInt(next());
        }

        long nextLong()
        {
            return Long.parseLong(next());
        }

        double nextDouble()
        {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
        }
    }
} public class Main {
    char[] cs;

    public static void main(String args[]) {
        new Main().run();
    }

    void run() {
        FastReader sc = new FastReader();
        cs = sc.next().toCharArray();
        solve();
    }

    void solve() {
        boolean[] odds = new boolean[26];
        for (int i = 0; i < cs.length; i++) {
            if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            }
        }
        boolean flag = true;
        for (int i = 0; i < odds.length; i++) {
            if (odds[i]) {
                flag = false;
                break;
            }
        }
        if (flag) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }

    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt()
        {
            return Integer.parseInt(next());
        }

        long nextLong()
        {
            return Long.parseLong(next());
        }

        double nextDouble()
        {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
        }
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {
    char[] cs;

    public static void main(String args[]) {
        new Main().run();
    }

    void run() {
        FastReader sc = new FastReader();
        cs = sc.next().toCharArray();
        solve();
    }

    void solve() {
        boolean[] odds = new boolean[26];
        for (int i = 0; i < cs.length; i++) {
            if (!odds[cs[i] - 'a']) {
                odds[cs[i] - 'a'] = true;
            } else {
                odds[cs[i] - 'a'] = false;
            }
        }
        boolean flag = true;
        for (int i = 0; i < odds.length; i++) {
            if (odds[i]) {
                flag = false;
                break;
            }
        }
        if (flag) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }

    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements())
            {
                try
                {
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt()
        {
            return Integer.parseInt(next());
        }

        long nextLong()
        {
            return Long.parseLong(next());
        }

        double nextDouble()
        {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try
            {
                str = br.readLine();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            return str;
        }
    }
}
