The term reaction-propulsion engine is identified in base64 scheme by the sequence cmVhY3Rpb24tcHJvcHVsc2lvbiBlbmdpbmU=, while the MD5 signature is equal to 26f5ca30e23ca8dc14de0f014b2484e5. The ASCII encoding of reaction-propulsion engine in hexadecimal notation is 7265616374696f6e2d70726f70756c73696f6e20656e67696e65.