s,t=map(int,input().split())
hi=input()
if hi == "<":
    if s < t:
        print("Yes")
    else:
        print("No")
elif hi == ">":
    if s > t:
        print("Yes")
    else:
        print("No")
else:
    if s == t:
        print("Yes")
    else:
        print("No")