The term single-rotor helicopter is identified in base64 scheme by the sequence c2luZ2xlLXJvdG9yIGhlbGljb3B0ZXI=, while the MD5 signature is equal to 903a2e700043f20f54c05d868ee11bb7. The ASCII encoding of single-rotor helicopter in hexadecimal notation is 73696e676c652d726f746f722068656c69636f70746572.