# これ解くのに 998244353 時間かかった！
# ぼくが弱いだけで, ★3.0 …かも？

# よく考えると T が大きければ何もする必要はないし, 時を戻すときも N+M-1 以上時を戻す必要もない.
# そう思うと, 時間の初期値を200として, 時間を400までもつ.
# -> 時間は 0 より戻れないし, 400 より進めない. でもそれでいい.
# その間で, (時間, 位置) の拡張 dijkstra 法を行うとよい.
# O((N+M)NM log(NM)) になる.

import heapq

n, m, k, t = map(int,input().split())
ikeru = [[[] for j in range(m)] for i in range(n)]
for i in range(n):
	for j in range(m):
		for x, y in [(-1, 0), (1, 0), (0, 1), (0, -1)]:
			if 0 <= i + x < n and 0 <= j + y < m:
				ikeru[i][j].append((i + x, j + y))

modoru = [[(-1,-1) for j in range(m)] for i in range(n)]
for i in range(k):
	a, b, c, d = map(int,input().split())
	a -= 1
	b -= 1
	modoru[a][b] = (c, d)

d = [[[10 ** 18] * 401 for i in range(m)] for i in range(n)]
d[0][0][200] = 0

pq = [(-d[0][0][200], 0, 0, 200)]

while pq:
	tmp, a, b, nowt = heapq.heappop(pq)
	tmp = -tmp
	if tmp > d[a][b][nowt]: continue
	for x, y in ikeru[a][b]:
		dist = tmp
		if dist < d[x][y][min(nowt+1, 400)]:
			d[x][y][min(nowt+1, 400)] = dist
			heapq.heappush(pq, (-dist, x, y, min(nowt+1, 400)))
	if modoru[a][b][0] == -1: continue
	c, dd = modoru[a][b]
	dist = tmp + dd
	if dist < d[a][b][max(0, nowt-c)]:
		d[a][b][max(0, nowt-c)] = dist
		heapq.heappush(pq, (-dist, a, b, max(0, nowt-c)))

ans = 10 ** 18
for ts in range(401):
	if ts - 200 > t: continue
	ans = min(ans, d[n-1][m-1][ts])

if ans == 10 ** 18:
	print(-1)
else:
	print(ans)