#include <bits/stdc++.h>
using namespace std;
const int N = 5e5;
int c0[11], c1[11], a[3][N], n, xo, an = 1023, o;
int f1(int k) {
  int el = 1 << k;
  for (int i = 0; i < n; ++i) {
    for (int j = 0; j < 3; ++j) {
      if (a[j][i] != -1) {
        if (!j)
          el |= a[j][i];
        else if (j == 1)
          el &= a[j][i];
        else
          el ^= a[j][i];
      }
    }
  }
  return (el & (1 << k)) != 0;
}
int f0(int k) {
  int el = 0;
  for (int i = 0; i < n; ++i) {
    for (int j = 0; j < 3; ++j) {
      if (a[j][i] != -1) {
        if (!j)
          el |= a[j][i];
        else if (j == 1)
          el &= a[j][i];
        else
          el ^= a[j][i];
      }
    }
  }
  return (el & (1 << k)) != 0;
}
signed main() {
  ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  cin >> n;
  for (int i = 0; i < n; ++i) {
    char ch;
    int c;
    cin >> ch >> c;
    a[0][i] = -1, a[1][i] = -1, a[2][i] = -1;
    if (ch == '|')
      a[0][i] = c;
    else if (ch == '&')
      a[1][i] = c;
    else
      a[2][i] = c;
  }
  for (int i = 0; i <= 9; ++i) {
    c1[i] = f1(i);
    c0[i] = f0(i);
    if (c1[i] && c0[i])
      o |= 1 << i;
    else if (!c1[i] && !c0[i])
      an -= 1 << i;
    else if (!c1[i] && c0[i])
      xo |= 1 << i;
  }
  cout << "3\n";
  cout << "& " << an << '\n' << "| " << o << '\n' << "^ " << xo;
}
