The term keep one's nose to the grindstone is identified in base64 scheme by the sequence a2VlcCBvbmUncyBub3NlIHRvIHRoZSBncmluZHN0b25l, while the MD5 signature is equal to 7c273e25b254a951c6026e7abb10865a. The ASCII encoding of keep one's nose to the grindstone in hexadecimal notation is 6b656570206f6e652773206e6f736520746f20746865206772696e6473746f6e65.