#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "C:\GCC\debug.h"
#else
#define debug(...) void(42)
#endif
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int q;
cin >> q;
vector<vector<int>> adj(q + 1);
vector<int> pref(q + 1);
auto Add = [&](int x, int y, int w) {
adj[x].push_back(y);
pref[y] = pref[x] ^ w;
};
int cnt = 1;
for (int i = 0; i < q; i++) {
string type;
cin >> type;
if (type == "Add") {
int x, w;
cin >> x >> w;
--x;
Add(x, cnt, w);
++cnt;
} else {
int a, b;
cin >> a >> b;
--a, --b;
int res = 0;
function<void(int, bool)> Dfs = [&](int u, bool insideSubtree) {
bool isOk = insideSubtree;
if (u == b) {
isOk = true;
}
if (isOk) {
res = max(res, pref[a] ^ pref[u]);
}
for (auto v : adj[u]) {
Dfs(v, isOk);
}
};
Dfs(0, false);
cout << res << '\n';
}
}
return 0;
}
