import enum
import sys

int1 = lambda x: int(x) - 1

# input = lambda: sys.stdin.buffer.readline()
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
i1 = lambda: int1(input())
mi = lambda: map(int, input().split())
mi1 = lambda: map(int1, input().split())
li = lambda: list(mi())
li1 = lambda: list(mi1())
lli = lambda n: [li() for _ in range(n)]

INF = float("inf")
mod = int(1e9 + 7)
# mod = 998244353

n, q = mi()
n += 2
s = "(" + input() + ")"

logn = 18
nxt = [[-1] * n for i in range(logn + 1)]
st = []
pa = [-1] * n
dep = [0] * n
for i, c in enumerate(s):
    if c == "(":
        st.append(i)
    else:
        j = st.pop()
        pa[j] = i
        pa[i] = j
        dep[j] = len(st)
        if st:
            nxt[0][j] = st[-1]

for j in range(logn):
    for i in range(n):
        if nxt[j][i] != -1:
            nxt[j + 1][i] = nxt[j][nxt[j][i]]

for _ in range(q):
    x, y = mi()
    if pa[x] < x:
        x = pa[x]
    if pa[y] < y:
        y = pa[y]

    if dep[x] > dep[y]:
        x, y = y, x
    for j in range(logn, -1, -1):
        if dep[y] - 2 ** j >= dep[x]:
            y = nxt[j][y]

    if x == y:
        ans = x
    else:
        for j in range(logn, -1, -1):
            if nxt[j][x] != nxt[j][y]:
                x = nxt[j][x]
                y = nxt[j][y]
        ans = nxt[0][x]
    if ans == 0:
        print(-1)
    else:
        print(ans, pa[ans])