#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 5;
int n, b[2][15], x, to_or, to_xor, to_and;
char ch;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cin >> n;
  for (int i = 0; i < 10; i++) {
    b[1][i] = 1;
  }
  for (int i = 1; i <= n; i++) {
    cin >> ch >> x;
    for (int j = 0; j < 10; j++) {
      int bit = ((x >> j) & 1);
      if (ch == '^') {
        b[1][j] ^= bit;
        b[0][j] ^= bit;
      } else if (ch == '|') {
        b[1][j] |= bit;
        b[0][j] |= bit;
      } else {
        b[1][j] &= bit;
        b[0][j] &= bit;
      }
    }
  }
  for (int i = 0; i < 10; i++) {
    if (b[1][i] == 1 && b[0][i] == 1) {
      to_or += (1 << i);
    } else if (b[1][i] == 0 && b[0][i] == 1) {
      to_xor += (1 << i);
    } else if (b[1][i] == 0 && b[0][i] == 0) {
      to_or += (1 << i);
      to_xor += (1 << i);
    }
  }
  if (to_and != 0)
    cout << 3 << "\n"
         << "& " << to_and << "\n";
  else
    cout << 2 << "\n";
  cout << "| " << to_or << "\n";
  cout << "^ " << to_xor;
}
