#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef int64_t lint;
#define rep(i, n) for(int i=0; i<n; i++)
#define repx(i, l, n) for(int i=l; i<n; i++)
#define all(v) v.begin(), v.end()
#define show(x) cout << #x << ": " << x << endl;
#define list(x) cout << #x << ": " << x << "  ";
#define pb push_back
using vi = vector<lint>;
using vvi = vector<vector<lint>>;
template<class T> inline void vin(vector<T>& v) { rep(i, v.size()) cin >> v.at(i); }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
template<class T> inline void drop(T x) { cout << x << endl; exit(0); }
template<class T> void vout(vector<T> v) { rep(i, v.size()) { cout << v.at(i) << ' '; } cout << endl; }
constexpr lint LINF = LLONG_MAX/2;

int main() {
	lint N, M, K, T;
	cin >> N >> M >> K >> T;
	vi A(K), B(K), C(K), D(K);
	rep(i, K) cin >> A[i] >> B[i] >> C[i] >> D[i];

	lint a=0, b=0, c=LINF, x, y, z;
	a = N-1+M-1 - T;
	if (a <= 0) drop(0);
	rep(i, K) {
		if (C[i] == 1) continue;
		x = a;
		y = 0;
		while (x > 0) {
			x -= C[i]-1;
			y += D[i];
		}
		chmin(c, y);
	}
	if (c == LINF) std::cout << "-1" << '\n';
	else std::cout << c << '\n';
}