The term hierarchical data structure is identified in base64 scheme by the sequence aGllcmFyY2hpY2FsIGRhdGEgc3RydWN0dXJl, while the MD5 signature is equal to 44854162545b0bd379a571c1ca77394f. The ASCII encoding of hierarchical data structure in hexadecimal notation is 68696572617263686963616c206461746120737472756374757265.