#include <bits/stdc++.h>
using namespace std;
struct oper {
  char a;
  short int b;
};
int n, newn;
int a = 1023, o = 0, x = 0;
int r1 = 1023, r2 = 0;
vector<oper> ops, newops;
void Input() {
  cin >> n;
  ops.resize(n);
  for (int i = 0; i < n; i++) cin >> ops[i].a >> ops[i].b;
}
void Body() {
  for (int i = 0; i < n; i++) {
    if (ops[i].a == '|') {
      r1 = r1 | ops[i].b;
      r2 = r2 | ops[i].b;
    }
    if (ops[i].a == '&') {
      r1 = r1 & ops[i].b;
      r2 = r2 & ops[i].b;
    }
    if (ops[i].a == '^') {
      r1 = r1 ^ ops[i].b;
      r2 = r2 ^ ops[i].b;
    }
  }
  int q1, q2, tmp;
  for (int i = 0; i < 10; i++) {
    q1 = r1 % 2;
    r1 = r1 / 2;
    q2 = r2 % 2;
    r2 = r2 / 2;
    tmp = pow((float)2, i);
    if (q1 == q2) {
      if (q1 == 0)
        a = a & ~tmp;
      else
        o = o | tmp;
    } else if (q1 == 0)
      x = x | tmp;
  }
}
void Output() {
  if (a != 1023) newn++;
  if (o != 0) newn++;
  if (x != 0) newn++;
  cout << newn << endl;
  if (a != 1023) cout << "& " << a << endl;
  if (o != 0) cout << "| " << o << endl;
  if (x != 0) cout << "^ " << x << endl;
}
int main() {
  Input();
  Body();
  Output();
  return 0;
}
