N = int(input())
S = [0]+list(map(int,list(input().strip())))
T = [0]+list(map(int,list(input().strip())))
D = {"S":S,"T":T}
Q = int(input())
K1 = N+1
K2 = N+1
for i in range(1,N+1):
    if S[i]==T[i]:continue
    if K1==N+1:
        K1 = i
        continue
    if K2==N+1:
        K2 = i
        break
for _ in range(Q):
    c,x,y = input().split()
    x = int(x)
    y = int(y)
    if x<K1:
        if D["S"][x]!=y:
            K2 = K1
            K1 = x
            D[c][x] = y
    elif x==K1:
        D[c][x] = y
        if D["S"][K1]==D["T"][K1]:
            K1 = K2
            K2 = N+1
            for i in range(K1+1,N+1):
                if D["S"][i]==D["T"][i]:
                    continue
                K2 = i
                break
    elif K1<x<K2:
        if D["S"][x]!=y:
            D[c][x] = y
            K2 = x
    elif x==K2:
        D[c][x] = y
        if D["S"][K2]==D["T"][K2]:
            K2=N+1
            for i in range(x+1,N+1):
                if D["S"][i]==D["T"][i]:
                    continue
                K2 = i
                break
    else:
        D[c][x] = y
    if K1==N+1:
        print("=")
    elif D["S"][K1]>D["T"][K1]:
        print(">")
    else:
        print("<")