#49 has multiple solutions: (base64) LjIyMgojMTExCiMxMTEKIzIjIwphbmQKMTEyMgojMTIyCiMxMjIKIy4jIw==
#57 has multiple solutions: (base64) Li4uLi4KLi4uMy4KLjEyMy4KLjEyMy4KLjEyMi4KYW5kCi4uLi4uCi4uMjIyCi4zMjEuCi4zLjEuCi4zLjEuCg==
letter Q feels very hard to deduct. are there good approaches to this?