N=int(input())
S=list(input())
T=list(input())
Q=int(input())
S_set,T_set=set([300000]),set([300000])
for i in range(N):
    if S[i]>T[i]:
        S_set.add(i)
    elif S[i]<T[i]:
        T_set.add(i)
for i in range(Q):
    c,x,y=input().split()
    x=int(x)-1
    if c=="T":
        T[x]=y
    if c=="S":
        S[x]=y
    if int(T[x])<int(S[x]):
        S_set.add(x)
        T_set.discard(x)
    elif int(T[x])>int(S[x]):
        T_set.add(x)
        S_set.discard(x)
    else:
        T_set.discard(x)
        S_set.discard(x)
    if min(S_set)<min(T_set):
        print(">")
    elif min(S_set)>min(T_set):
        print("<")
    else:
        print("=")