#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using mint = modint1000000007;
const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
//const long long LINF = 1e18;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n-1); i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define endl "\n"
#define P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
int deep(int x) {
	int ret = 0;
	while (x) {
		x /= 2;
		ret++;
	}
	return ret - 1;
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int n, l, r, d; cin >> n >> l >> r >> d;
	int dl = deep(l);
	int dr = deep(r);
	vector<mint>fact((1 << 20) + 1, 1);
	rep2(i, 1, fact.size())fact[i] = fact[i - 1] * i;
	int lca = (dr + dl - d) / 2;
	//cout << dl << " " << dr << endl;
	//cout << lca << endl;
	if ((dr + dl < d) || ((dr - dl) % 2 != d % 2) || (dr - dl > d)) {
		cout << 0 << endl;
		return 0;
	}
	mint ans = 1;
	rep(i, n) {
		int x = 1 << i;
		if (i == dl)x--;
		if (i == dr)x--;
		ans *= fact[x];
	}
	ans *= 1 << lca;
	if (dl != lca)ans *= 1 << (dl - lca - 1);
	if (dr != lca)ans *= 1 << (dr - lca - 1);
	ans *= 2;
	cout << ans.val() << endl;
	return 0;
}