import sys
input = sys.stdin.readline

N = int(input())
S = list(input().rstrip("\n"))
T = list(input().rstrip("\n"))
Q = int(input())

tigauketa = N
for i in range(N):
    if S[i] != T[i]:
        tigauketa = i
        break
if S > T:
    prevans = ">"
elif S == T:
    prevans = "="
else:
    prevans = "<"
for iii in range(Q):
    c, x, y = input().split()
    x = int(x) - 1
    if c == "S":
        S[x] = y
    else:
        T[x] = y
    if x <= tigauketa:
        if S[x] == T[x]:
            tigauketa = N
            for i in range(x + 1, N):
                if S[i] != T[i]:
                    tigauketa = i
                    break
            if tigauketa == N:
                prevans = "="
                print("=")
            elif S[tigauketa] > T[tigauketa]:
                prevans = ">"
                print(">")
            else:
                prevans = "<"
                print("<")
        else:
            tigauketa = x
            if S[x] > T[x]:
                prevans = ">"
                print(">")
            elif S[x] == T[x]:
                prevans = "="
                print("=")
            else:
                prevans = "<"
                print("<")
    else:
        print(prevans)