import sys
input = sys.stdin.readline

class Fenwick_Tree:
    def __init__(self, n):
        self._n = n
        self.data = [0] * n

    def add(self, p, x):
        assert 0 <= p < self._n
        p += 1
        while p <= self._n:
            self.data[p - 1] += x
            p += p & -p

    def sum(self, l, r):
        assert 0 <= l <= r <= self._n
        return self._sum(r) - self._sum(l)

    def _sum(self, r):
        s = 0
        while r > 0:
            s += self.data[r - 1]
            r -= r & -r
        return s

    def get(self, k):
        k += 1
        x, r = 0, 1
        while r < self._n:
            r <<= 1
        len = r
        while len:
            if x + len - 1 < self._n:
                if self.data[x + len - 1] < k:
                    k -= self.data[x + len - 1]
                    x += len
            len >>= 1
        return x

    def __str__(self):
        temp = []
        for i in range(self._n):
            temp.append(str(self.sum(i, i + 1)))
        return ' '.join(temp)


N, Q = map(int, input().split())
S = list(input())
h = S.count("D")
w = N - h
T1 = Fenwick_Tree(3 * N)
T2 = Fenwick_Tree(3 * N)
for i in range(N):
    if S[i] == "D":
        T1.add(i, 1)
        T1.add(i + N, 1)
        T1.add(i + 2 * N, 1)
    else:
        T2.add(i, 1)
        T2.add(i + N, 1)
        T2.add(i + 2 * N, 1)
        
def BinarySearch(check, yes = 10 ** 18, no = -1):
    while abs(yes - no) != 1:
        mid = (yes + no)//2
        if check(mid):
            yes = mid
        else:
            no = mid
    return yes

def check1(m):
    return (H - h * m) >= 0 and (W - w * m) >= 0

def check2(r):
    x = T1.sum(P, r)
    y = T2.sum(P, r)
    return H - x <= 0 or W - y <= 0

for _ in range(Q):
    H, W, P = map(int, input().split())
    m = BinarySearch(check1, 0, 10 ** 9 + 5)
    H -= m * h
    W -= m * w
    if H == 0 or W == 0:
        print(P)
        continue
    print(BinarySearch(check2, 3 * N, P)%N)