# input
import sys
input = sys.stdin.readline
II = lambda : int(input())
MI = lambda : map(int, input().split())
LI = lambda : [int(a) for a in input().split()]
SI = lambda : input().rstrip()
LLI = lambda n : [[int(a) for a in input().split()] for _ in range(n)]
LSI = lambda n : [input().rstrip() for _ in range(n)]
MI_1 = lambda : map(lambda x:int(x)-1, input().split())
LI_1 = lambda : [int(a)-1 for a in input().split()]

mod = 998244353
inf = 1001001001001001001
ordalp = lambda s : ord(s)-65 if s.isupper() else ord(s)-97
ordallalp = lambda s : ord(s)-39 if s.isupper() else ord(s)-97
yes = lambda : print("Yes")
no = lambda : print("No")
yn = lambda flag : print("Yes" if flag else "No")

prinf = lambda ans : print(ans if ans < 1000001001001001001 else -1)
alplow = "abcdefghijklmnopqrstuvwxyz"
alpup = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
alpall = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
URDL = {'U':(-1,0), 'R':(0,1), 'D':(1,0), 'L':(0,-1)}
DIR_4 = [[-1,0],[0,1],[1,0],[0,-1]]
DIR_8 = [[-1,0],[-1,1],[0,1],[1,1],[1,0],[1,-1],[0,-1],[-1,-1]]
DIR_BISHOP = [[-1,1],[1,1],[1,-1],[-1,-1]]
prime60 = [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59]
sys.set_int_max_str_digits(0)
# sys.setrecursionlimit(10**6)
# import pypyjit
# pypyjit.set_param('max_unroll_recursion=-1')

from collections import defaultdict,deque
from heapq import heappop,heappush
from bisect import bisect_left,bisect_right
DD = defaultdict
BSL = bisect_left
BSR = bisect_right

class SegTree:
    __slots__ = ["n", "size", "op", "e", "data"]
    
    def __init__(self, op, e, lst):
        self.n = len(lst)
        self.size = 1 << (self.n - 1).bit_length()
        self.op = op
        self.e = e
        self.data = [e] * (2 * self.size)
        for i in range(self.n):
            self.data[self.size + i] = lst[i]
        for i in range(self.size - 1, 0, -1):
            self.data[i] = self.op(self.data[2*i], self.data[2*i+1])
    
    def get(self, i):
        return self.data[self.size+i]
    
    def add(self, i, x):
        i += self.size
        self.data[i] = self.op(x, self.data[i])
        while i > 1:
            i >>= 1
            self.data[i] = self.op(self.data[2*i], self.data[2*i+1])
    
    def set(self, i, x):
        i += self.size
        self.data[i] = x
        while i > 1:
            i >>= 1
            self.data[i] = self.op(self.data[2*i], self.data[2*i+1])
    
    def prod(self, l, r):
        if r <= l:
            return self.e
        lres = self.e
        rres = self.e
        l += self.size
        r += self.size
        while l < r:
            if l & 1:
                lres = self.op(lres, self.data[l])
                l += 1
            if r & 1:
                r -= 1
                rres = self.op(self.data[r], rres)
            l >>= 1
            r >>= 1
        return self.op(lres, rres)
    
    def all_prod(self):
        return self.data[1]
    
    def max_right(self, l, g):
        assert 0<=l and l<=self.n
        assert g(self.e)
        if l == self.n: return self.n
        l += self.size
        sm = self.e
        while 1:
            while l&1 == 0:
                l >>= 1
            if not(g(self.op(sm, self.data[l]))):
                while l < self.size:
                    l = 2*l
                    nsm = self.op(sm, self.data[l])
                    if g(nsm):
                        sm = nsm
                        l += 1
                return l-self.size
            sm = self.op(sm, self.data[l])
            l += 1
            if (l&-l) == l: break
        return self.n
    
    def min_left(self, r, g):
        if r == -1: r = self.n
        assert 0<=r and r<=self.n
        assert g(self.e)
        if r == 0: return 0
        r += self.size
        sm = self.e
        while 1:
            r -= 1
            while (r>1 and r&1):
                r >>= 1
            if not(g(self.op(self.data[r], sm))):
                while r < self.size:
                    r = 2*r+1
                    nsm = self.op(self.data[r], sm)
                    if g(nsm):
                        sm = nsm
                        r -= 1
                return r + 1 -self.size
            sm = self.op(self.data[r], sm)
            if (r&-r) == r: break
        return 0
    
    def __str__(self):
        return str(self.data[self.size:self.size+self.n])

def op(x, y):
    return x | y

n, q = MI()
s = SI()

a = [1 << ordalp(s[i]) for i in range(n)]

seg = SegTree(op, 0, a)


for i in range(q):
    qry = input().split()
    if qry[0] == "1":
        _, i, c = qry
        i = int(i) - 1
        seg.set(i, 1 << ordalp(c))
    else:
        _, t = qry
        
        now = 0
        for c in t:
            y = 1 << ordalp(c)
            r = seg.max_right(now, lambda x : (x & y) == 0)
            if r == n:
                print("No")
                break
            now = r + 1
        else:
            print("Yes")