#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  scanf("%d", &n);
  vector<int> ans(10);
  vector<bool> fix(10);
  while (n--) {
    char ch;
    int a;
    cin >> ch;
    scanf("%d", &a);
    int i = 0;
    while (i < 10) {
      int bpos = a & 1;
      if (ch == '|') {
        if (bpos == 1) {
          ans[i] = bpos;
          fix[i] = true;
        }
      } else if (ch == '&') {
        if (bpos == 0) {
          ans[i] = bpos;
          fix[i] = true;
        }
      } else {
        if (bpos == 1) ans[i] = 1 - ans[i];
      }
      i++;
      a = a >> 1;
    }
  }
  int xorval = 0, andval = 1023, orval = 0, num = 1;
  for (int i = 0; i < 10; i++) {
    if (fix[i] == true) {
      if (ans[i] == 1)
        orval += num;
      else
        andval -= num;
    } else {
      if (ans[i] == 1) xorval += num;
    }
    num = num << 1;
  }
  printf("%d\n", 3);
  printf("%c %d\n", '&', andval);
  printf("%c %d\n", '|', orval);
  printf("%c %d\n", '^', xorval);
}
