The term karelian isthmus is identified in base64 scheme by the sequence a2FyZWxpYW4gaXN0aG11cw==, while the MD5 signature is equal to bbff68362ca42be51da56cf6b3c5e722. The ASCII encoding of karelian isthmus in hexadecimal notation is 6b6172656c69616e20697374686d7573.