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

#include <bits/stdc++.h>
using namespace std;
int a[12], b[5];
int main() {
  for (int i = 0; i < 12; i++) a[i] = -1;
  int n, x, cnt;
  char s[3];
  scanf("%d", &n);
  while (n--) {
    scanf("%s%d", s, &x);
    cnt = 0;
    if (s[0] == '|') {
      while (x > 0) {
        if (x & 1) a[cnt] = 1;
        x >>= 1;
        cnt++;
      }
    } else if (s[0] == '&') {
      while (x > 0) {
        if ((x & 1) == 0) {
          a[cnt] = 0;
        }
        x >>= 1;
        cnt++;
      }
    } else if (s[0] == '^') {
      while (x > 0) {
        if (x & 1) {
          if (a[cnt] == -1)
            a[cnt] = 2;
          else if (a[cnt] == 0)
            a[cnt] = 1;
          else if (a[cnt] == 1)
            a[cnt] = 0;
          else if (a[cnt] == 2)
            a[cnt] = -1;
        }
        x >>= 1;
        cnt++;
      }
    }
  }
  memset(b, 0, sizeof(b));
  int f = 0;
  for (int i = 0; i < 10; i++) {
    if (a[i] != -1) f = 1;
    if (a[i] != 0)
      b[1] += (1 << i);
    else if (a[i] == 0)
      f = 2;
    else if (a[i] == 1)
      b[2] += (1 << i);
    else if (a[i] == 2)
      b[3] += (1 << i);
  }
  if (f == 0) return 0 * puts("0");
  cnt = 0;
  for (int i = 1; i <= 3; i++)
    if (b[i]) cnt++;
  bool flag = false;
  if (f == 2 && b[1] == 0) {
    cnt++;
    flag = true;
  }
  printf("%d\n", cnt);
  if (flag)
    puts("& 0");
  else if (b[1])
    printf("& %d\n", b[1]);
  if (b[2]) printf("| %d\n", b[2]);
  if (b[3]) printf("^ %d\n", b[3]);
  return 0;
}
