N = int(input())
S = list(input())
T = list(input())
Q = int(input())
for i in range(N):
    S[i]=int(S[i])
    T[i]=int(T[i])

state = 0  # [0:=] [1:>] [2:<]
for i in range(N):
    if S[i]<T[i]:
        state = 2
        break
    if S[i]>T[i]:
        state = 1
        break
difi = i

for i in range(Q):
    c,x,y=input().split()
    x=int(x)
    y=int(y)
    if c=='T':
        if T[x-1] == y:
            if state==0:
                print('=')
            elif state==1:
                print('>')
            else:
                print('<')
            continue
        else:
            T[x-1] = y
    else:
        if S[x-1] == y:
            if state==0:
                print('=')
            elif state==1:
                print('>')
            else:
                print('<')
            continue
        else:
            S[x-1] = y

    if difi>=x-1:
        for j in range(x-1,N):
            if S[j]<T[j]:
                state = 2
                break
            if S[j]>T[j]:
                state = 1
                break
        else:
            state=0
        difi = j

    if state==0:
        print('=')
    elif state==1:
        print('>')
    else:
        print('<')