import sys
input = sys.stdin.readline  # "\n"を含む

def solve(A, B):
    if A == B:
        return "Yes"
    elif A == 2 and B == 4:
        return "Yes"
    elif A == 4 and B == 2:
        return "Yes"
    else:
        return "No"

def main():
    A, B = map(int, input().split())
    res = solve(A, B)
    print(res)

if __name__ == "__main__":
    main()