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.util.*;
import java.io.*;
import java.math.*;
public class Main
{
    public static void main(String[] args) throws IOException
    {
        Scanner sc=new Scanner(System.in);
        int n = sc.nextInt();
        char cha[]=new char[n];
        int arr[]=new int[n];
        for(int i=0;i<n;i++)
        {
            String s = sc.next();
            cha[i]=s.charAt(0);
            arr[i]=sc.nextInt();
        }
        int or=0;
        int and=0;
        int xor=0;
        for(int i = 0 ;i<n;i++)
        {
            if(cha[i]=='&')
            {
                if(and==0)
                and=arr[i];
                else
                and&=arr[i];
            }
            if(cha[i]=='|')
            {
               if(or==0)
                or=arr[i];
                else
                or|=arr[i];
            }
            if(cha[i]=='^')
            {
               if(xor==0)
                xor=arr[i];
                else
                xor^=arr[i];
            }
        }
        int val=0;
        if(xor>0)
        val++;
         if(and>0)
        val++;
         if(or>0)
        val++;
        System.out.println(val);
        if(and>0)
        System.out.println("& "+and);
        if(or>0)
        System.out.println("| "+or);
        if(xor>0)
        System.out.println("^ "+xor);
    }
}