N, Q = map(int, input().split())
S = input()

L = []
Y = [[] for _ in range(Q)]

for i in range(Q):
    L.append(list(map(int, input().split())))

for i in list(set([p[0] for p in L])):
    a = [[j, x] for j, x in enumerate(L) if x[0] == i]
    for k in list(set([q[1][1] for q in a])):
        b = [[y[1][2], y] for y in a if y[1][1] == k]
        s = ''.join(sorted(S[(i-1):k]))
        for l in list(set([r[0] for r in b])):
            for m in b:
                if l==m[0]:
                    Y[l-1] = s[l-1]

for i in range(Q):
    print(Y[i])