#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int a = 0, b = 1023, c, n;
  char op;
  cin >> n;
  for (int i = 0; i < n; ++i) {
    cin >> op >> c;
    switch (op) {
      case '|':
        a |= c;
        b |= c;
        break;
      case '&':
        a &= c;
        b &= c;
        break;
      case '^':
        a ^= c;
        b ^= c;
        break;
    }
  }
  int r = 0, nd = 1023, xr = 0;
  for (int i = 0; i < 10; ++i) {
    int p = (a >> i) & 1;
    int q = (b >> i) & 1;
    if (!p && !q) {
      nd ^= (1 << i);
    } else if (p && !q) {
      xr |= (1 << i);
    } else if (p && q) {
      r |= (1 << i);
    }
  }
  int s = 3;
  if (nd == 1023) s--;
  if (xr == 0) s--;
  if (r == 0) s--;
  cout << s << endl;
  if (nd != 1023) cout << "& " << nd << endl;
  if (xr != 0) cout << "^ " << xr << endl;
  if (r != 0) cout << "| " << r << endl;
  return 0;
}
