#include <bits/stdc++.h>
using namespace std;
long long int status(long long int a, long long int b, long long int i) {
  a >>= i;
  b >>= i;
  a = a % 2;
  b = b % 2;
  if (a == 0)
    if (b == 1)
      return 1;
    else
      return 4;
  if (b == 1) return 3;
  return 2;
}
void solve() {
  long long int n;
  cin >> n;
  long long int a = 0, b = 1023;
  for (long long int i = 0; i < n; ++i) {
    char c;
    long long int x;
    cin >> c >> x;
    if (c == '^') {
      a ^= x;
      b ^= x;
    } else if (c == '|') {
      a |= x;
      b |= x;
    } else {
      a &= x;
      b &= x;
    }
  }
  long long int x = 0, o = 0, ad = 0;
  long long int xr = 0, ore = 0, adr = 0;
  for (long long int i = 0; i < 10; ++i) {
    long long int c = status(a, b, i);
    if (c == 1) {
      ad += pow(2, i);
    } else if (c == 2) {
      xr = 1;
      x += pow(2, i);
      ad += pow(2, i);
    } else if (c == 3) {
      ore = 1;
      o += pow(2, i);
      ad += pow(2, i);
    } else {
      adr = 1;
    }
  }
  cout << ore + xr + adr << endl;
  if (ore == 1) cout << "| " << o << endl;
  if (xr == 1) cout << "^ " << x << endl;
  if (adr == 1) cout << "& " << ad << endl;
}
int main() {
  solve();
  return 0;
}
