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 void main(String[] args) throws IOException {
        FastScanner sc=new FastScanner(System.in);
        int n=sc.nextInt();
        if(n<=5){
            System.out.println(n);
            for(int i=0;i<n;i++){
                char c=sc.next().charAt(0);
                int e=sc.nextInt();
                System.out.println(c+ " "+e);
            }
            return;
        }
        int a[]=new int[3];//[or,and,xor];
        Arrays.fill(a, -1);
        LinkedHashSet<Integer> order=new LinkedHashSet();
        for(int i=0;i<n;i++){
            char c=sc.next().charAt(0);
            int e=sc.nextInt();
            switch(c){
                case'|':
                    order.add(0);
                    if(a[0]==-1)a[0]=e;
                    else a[0]=a[0]|e;
                    break;
                case'&':
                    order.add(1);
                    if(a[1]==-1)a[1]=e;
                    else a[1]=a[1]&e;
                    break;
                case'^':
                    order.add(2);
                    if(a[2]==-1)a[2]=e;
                    else a[2]=a[2]^e;
            }
        }
        int c=0;
        for(int i=0;i<3;i++){
            if(a[i]!=-1)c++;
        }
        System.out.println(c);
        /*
        String sympol[]={"|","&","^"};
        Iterator<Integer> it=order.iterator();
        while(it.hasNext()){
            int i=it.next();
            System.out.println(sympol[i]+" "+a[i]);
        }
        */
        
        if(a[0]!=-1){
            System.out.println("| "+a[0]);
        }if(a[2]!=-1){
            System.out.println("^ "+a[2]);
        }if(a[1]!=-1){
            System.out.println("& "+a[1]);
        }
        
        
    }
     //__________________________________________________________
    static class FastScanner {
	    BufferedReader br;
	    StringTokenizer st;
            public FastScanner(InputStream i) {
	        br =  new BufferedReader(new InputStreamReader(i));
	        st = new StringTokenizer("");
	    }
	    public String next() throws IOException {
	        if(st.hasMoreTokens())return st.nextToken();
                else st = new StringTokenizer(br.readLine());
	        return next();
	    }
	    public int nextInt() throws IOException {return Integer.parseInt(next());}
	    public long nextLong() throws IOException {return Long.parseLong(next());}
	    public double nextDouble() throws IOException {return Double.parseDouble(next());}
	}
}
  
