There are two main kinds of events in the life of top-model: fashion shows and photo shoots. Participating in any of these events affects the rating of appropriate top-model. After each photo shoot model's rating increases by *a* and after each fashion show decreases by *b* (designers do too many experiments nowadays). Moreover, sometimes top-models participates in talk shows. After participating in talk show model becomes more popular and increasing of her rating after photo shoots become *c* and decreasing of her rating after fashion show becomes *d*.

Izabella wants to participate in a talk show, but she wants to do it in such a way that her rating will never become negative. Help her to find a suitable moment for participating in the talk show. 

Let's assume that model's career begins in moment 0. At that moment Izabella's rating was equal to *start*. If talk show happens in moment *t* if will affect all events in model's life in interval of time [*t*..*t* + *len*) (including *t* and not including *t* + *len*), where *len* is duration of influence.

Izabella wants to participate in a talk show, but she wants to do it in such a way that her rating will not become become negative before talk show or during period of influence of talk show. Help her to find a suitable moment for participating in the talk show.
In first line there are 7 positive integers *n*, *a*, *b*, *c*, *d*, *start*, *len* (1 ≤ *n* ≤ 3·10<sup class="upper-index">5</sup>, 0 ≤ *start* ≤ 10<sup class="upper-index">9</sup>, 1 ≤ *a*, *b*, *c*, *d*, *len* ≤ 10<sup class="upper-index">9</sup>), where *n* is a number of fashion shows and photo shoots, *a*, *b*, *c* and *d* are rating changes described above, *start* is an initial rating of model and *len* is a duration of influence of talk show.

In next *n* lines descriptions of events are given. Each of those lines contains two integers *t*<sub class="lower-index">*i*</sub> and *q*<sub class="lower-index">*i*</sub> (1 ≤ *t*<sub class="lower-index">*i*</sub> ≤ 10<sup class="upper-index">9</sup>, 0 ≤ *q* ≤ 1) — moment, in which event happens and type of this event. Type 0 corresponds to the fashion show and type 1 — to photo shoot. 

Events are given in order of increasing *t*<sub class="lower-index">*i*</sub>, all *t*<sub class="lower-index">*i*</sub> are different.
none
5 1 1 1 4 0 5
1 1
2 1
3 1
4 0
5 0
6
1 1 2 1 2 1 2
1 0
-1
10 1 1 1 2 0 10
1 1
2 1
3 0
4 0
5 1
6 1
7 1
8 1
9 1
10 1
5
def read():
	return tuple(map(int, input().split()))


def rate(t):
	if t == -1:
		return start
	return start + l[t][2]*a - l[t][3]*b

def rate2(t1, t2):
	if t1 == -1:
		if t2 == -1:
			return 0
		else:
			return l[t2][2]*c - l[t2][3]*d
	else:
		return (l[t2][2] - l[t1][2])*c - (l[t2][3] - l[t1][3])*d

n, a, b, c, d, start, length = read()

l = []
for i in range(n):
	t = read()
	if i == 0:
		t += (t[1], 1 - t[1])
	elif t[1] == 0:
		t += (l[-1][2], 1 + l[-1][3])
	else:
		t += (1 + l[-1][2],l[-1][3])
	while len(l) < t[0]:
		l.append((0, 0, 0, 0))
	l[t[0] - 1] = t
l.append(l[-1])
l.append(l[-1])
l.append(l[-1])
i = 0
flag = True
while i < n:
	j = 0
	flag = True
	for j in range(length):

		if i + j >= n:
			break
		else:
			# print([i, j, a, b, rate(i - 1),  rate2(i - 1, i + j)])
		if rate(i - 1) + rate2(i - 1, i + j) < 0:
			flag = False
			break
	if flag:
		print(i + 1)
		break
	i += 1
if rate(n - 1) > 0:
	print(n + 1)
elif not flag:
	print(-1)