import sys
input = sys.stdin.readline

N, Q = map(int, input().split())
S = list(input())
h = S.count("D")
w = N - h
T1 = [0] * 2 * N
T2 = [0] * 2 * N
Ac1 = [0] * (2 * N + 1)
Ac2 = [0] * (2 * N + 1)
for i in range(N):
    if S[i] == "D":
        T1[i] += 1
        T1[i + N] += 1
    else:
        T2[i] += 1
        T2[i + N] += 1
        
for i in range(2 * N):
    Ac1[i + 1] = Ac1[i] + T1[i]
    Ac2[i + 1] = Ac2[i] + T2[i]
        
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 check(r):
    x = Ac1[r] - Ac1[P]
    y = Ac2[r] - Ac2[P]
    return H - x <= 0 or W - y <= 0

def div(x, y):
    if y == 0:
        return 10 ** 18
    return x // y

for _ in range(Q):
    H, W, P = map(int, input().split())
    m = min(div(H - 1, h), div(W - 1, w))
    H -= m * h
    W -= m * w
    print(BinarySearch(check, 2 * N, P)%N)