The term caterpillar track is identified in base64 scheme by the sequence Y2F0ZXJwaWxsYXIgdHJhY2s=, while the MD5 signature is equal to ef4eb2d2072620e12e423abf706080ba. The ASCII encoding of caterpillar track in hexadecimal notation is 636174657270696c6c617220747261636b.