# 数字が大きすぎるか
# どの桁まで同じかを管理するのでどうだろう

def check(LIST1, LIST2):
    idx = -1
    for i in range(N):
        if S_list[i] == T_list[i]:
            idx = i
        elif S_list[i] > T_list[i]:
            return idx, '>'
        elif S_list[i] < T_list[i]:
            return idx, '<'
    return N-1, '='

N = int(input())
S = input()
T = input()
S_list = list(map(int, S))
T_list = list(map(int, T))
same, ans = check(S_list, T_list)

Q = int(input())
for i in range(Q):
    query = list(map(str, input().split()))
    d = int(query[1])-1
    new = int(query[2])
    if d <= same+1:
        if query[0] == 'S':
            S_list[d] = new
        elif query[0] == 'T':
            T_list[d] = new
        same, ans = check(S_list, T_list)
        print(ans)
    elif d > same+1:
        if query[0] == 'S':
            S_list[d] = new
        elif query[0] == 'T':
            T_list[d] = new
        print(ans)