N = int(input())
S = list(str(input()))
T = list(str(input()))
Q = int(input())
A = set()
for i in range(N):
    if S[i] != T[i]:
        A.add(i)

for _ in range(Q):
    c,x,y = map(str,input().split())
    x = int(x)-1
    if c == 'T':
        T[x] = y
    else:
        S[x] = y
    if S[x] != T[x]:
        A.add(x)
    else:
        A.discard(x)
    a = list(A)[0]

    if S[a] > T[a]:
        print('>')
    elif S[a] < T[a]:
        print('<')
    else:
        print('=')
        print(A,S,T)