#include <bits/stdc++.h>
using namespace std;
const int MAXN = 500005;
int a[MAXN];
int opt[MAXN], dt[MAXN];
int n;
char s;
int main() {
  scanf("%d", &n);
  for (int i = 1; i <= n; i++) {
    scanf("\n%c %d", &s, &dt[i]);
    if (s == '|')
      opt[i] = 0;
    else if (s == '&')
      opt[i] = 1;
    else
      opt[i] = 2;
  }
  int land = (1 << 10) - 1, lxor = 0, lor = 0;
  for (int i = 0; i < 10; i++) {
    int zero = 0, one = 1;
    for (int j = 1; j <= n; j++) {
      if (opt[j] == 0)
        zero |= ((dt[j] >> i) & 1), one |= ((dt[j] >> i) & 1);
      else if (opt[j] == 1)
        one &= ((dt[j] >> i) & 1), zero &= ((dt[j] >> i) & 1);
      else {
        one ^= ((dt[j] >> i) & 1);
        zero ^= ((dt[j] >> i) & 1);
      }
    }
    if (zero == 0 && one == 1)
      ;
    else if (zero == 1 && one == 1)
      lor |= (1 << i);
    else if (zero == 0 && one == 0)
      land ^= (1 << i);
    else
      lxor |= (1 << i);
  }
  cout << 3 << endl;
  cout << "& " << land << endl;
  cout << "| " << lor << endl;
  cout << "^ " << lxor << endl;
  return 0;
}
