1192-left_right.cpp

#include <bits/stdc++.h>
#define ll long long
#define MAX 100100

using namespace std;

ll arr[100100];
vector <pair <ll, ll> > v;


int main()
{
#ifndef ONLINE_JUDGE
	freopen("/home/sameer/Documents/sameer/input.sam", "r", stdin);
#endif
	ios_base::sync_with_stdio(false);
	ll i, j, k, n, m, t, cont, a, b;
	cin >> t;
	ll cases = t;

	while (t--) {
		cin >> n ;
		ll xori = 0;

		for (i = 0; i < n; i++) {
			cin >> a >> b;
			xori ^= (b - a - 1);
		}

		if (xori == 0)
			cout << "Case " << cases - t << ": Bob"   << endl;
		else
			cout << "Case " << cases - t << ": Alice"   << endl;
	}

	return 0;
}