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.*;
import java.util.*;

public class Main {

	public static class InputReader {
		public BufferedReader reader;
		public StringTokenizer tokenizer;

		public InputReader(InputStream stream) {
			reader = new BufferedReader(new InputStreamReader(stream), 32768);
			tokenizer = null;
		}

		public String next() {
			while (tokenizer == null || !tokenizer.hasMoreTokens()) {
				try {
					tokenizer = new StringTokenizer(reader.readLine());
				} catch (IOException e) {
					throw new RuntimeException(e);
				}
			}
			return tokenizer.nextToken();
		}

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

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

	public static void main(String[] args) {
		InputStream inputStream = System.in;
		InputReader scn = new InputReader(inputStream);
	
		
		int n = scn.nextInt();
		int[] a = new int[10];
		Arrays.fill(a, -1);
		
		int[][] arr = new int[2][n];
		for(int i = 0;  i < n; i++) {
			char ch = scn.next().charAt(0);
			if(ch == '&') {
				arr[0][i] = 1;
			} else if(ch == '|') {
				arr[0][i] = 2;
			} else {
				arr[0][i] = 3;
			}
			arr[1][i] = scn.nextInt();
		}
		int ans = 0;
		for(int i = 0; i < n; i++) {
			String str = Integer.toBinaryString(arr[1][i]);

			for(int j = 0; j < 10; j++) {
				if(j < str.length()) {
					if(arr[0][i] == 1 && str.charAt(str.length() - j - 1) == '0') {
						a[j] = 0;
					} else if(arr[0][i] == 2 && str.charAt(str.length() - j - 1) == '1') {
						a[j] = 1;
					} else if(arr[0][i] == 3) {
						if(str.charAt(str.length() - j - 1) == '1' && a[j] != -1) {
							a[j] = a[j] == 1 ? 0 : 1;
						} else if(str.charAt(str.length() - j - 1) == '0' && a[j] != -1) {
							a[j] = a[j] == 0 ? 0 : 1;
						}
					}
				} else {
					if(arr[0][i] == 1) {
						a[j] = 0;
					} else if(arr[0][i] == 2) {
						if(a[j] == 1) {
							a[j] = 0;
						}
					}
				}
			}
		}
		int k = 0;
		int x = 0, y = 0;
		for(int i = 0; i < 10; i++) {
			if(a[i] == 1) {
				x += Math.pow(2, i);
			}
			if(a[i] == 0) {
				y += Math.pow(2, i);
			}
		}
		int c = 0;
		if(x > 0) {
			c++;
		}
		if(y > 0) {
			c++;
		}
		System.out.println(c);
		if(x > 0) {
			System.out.println("| " + x);
		}
		if(y > 0) {
			System.out.println("& " + y);
		}
	}
}