1
& 0
 1
^ 123
 10
^ 218
& 150
| 935
& 61
| 588
& 897
| 411
| 584
^ 800
| 704
 3
& 1
& 3
& 5
 1
| 123
 1
^ 0
 1
| 1023
 3
& 242
^ 506
^ 522
 10
^ 160
& 1021
& 510
^ 470
& 1022
& 251
& 760
& 1016
| 772
| 515
 1
& 1023
 1
| 0
 2
| 56
^ 875
 1
^ 1023
 2
| 999
^ 689
 3
^ 125
^ 377
& 1019
 1
& 123

3
& 0
| 0
^ 0
 3
& 1023
| 0
^ 123
 3
& 763
| 763
^ 0
 3
& 1
| 0
^ 0
 3
& 1023
| 123
^ 0
 3
& 1023
| 0
^ 0
 3
& 1023
| 1023
^ 0
 3
& 1010
| 768
^ 240
 2
| 775
^ 112
 3
& 1023
| 0
^ 0
 3
& 1023
| 0
^ 0
 3
& 983
| 16
^ 835
 3
& 1023
| 0
^ 1023
 3
& 350
| 326
^ 16
 3
& 1019
| 0
^ 256
 3
& 123
| 0
^ 0

import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.PrintStream;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskC solver = new TaskC();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskC {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int t = in.nextInt();
            int and = 0;
            int or = 0;
            int xor = 0;
            String array[] = new String[t];
            for (int i = 0; i < t; i++) {
                array[i] = in.next();
                if (array[i].equals("&")) {
                    if (and == 0) and = in.nextInt();
                    else {
                        and = and & in.nextInt();
                    }
                } else if (array[i].equals("|")) {
                    if (or == 0) or = in.nextInt();
                    else {
                        or = or | in.nextInt();
                    }
                } else {
                    if (xor == 0) xor = in.nextInt();
                    else {
                        xor = xor ^ in.nextInt();
                    }
                }
            }
            int count = 0;
            if (and != 0) count++;
            if (or != 0) count++;
            if (xor != 0) count++;
            System.out.println(count);
            boolean a = true, o = true, x = true;
            count = 3;
            for (int i = 0; i < t && count > 0; i++) {
                if (array[i].equals("&") && a) {
                    a = false;
                    count--;
                    if (and != 0) System.out.println("& " + and);
                }
                if (array[i].equals("|") && o) {
                    o = false;
                    count--;
                    if (or != 0) System.out.println("| " + or);
                }
                if (array[i].equals("^") && x) {
                    x = false;
                    count--;
                    if (xor != 0) System.out.println("^ " + xor);
                }
            }
            //if(and==0 && or==0 && xor==0)System.out.println("0");
        }

    }
}

