The term lightheartedness is identified in base64 scheme by the sequence bGlnaHRoZWFydGVkbmVzcw==, while the MD5 signature is equal to c2c0709f7ee11a0033a9e59129e6de2f. The ASCII encoding of lightheartedness in hexadecimal notation is 6c69676874686561727465646e657373.