However this is totally impractical for {TAIL ~ minimally reasonable hash functions} such as {HEAD ~ SHA} 1 
However this is totally impractical for { TAIL ~ minimally reasonable hash functions } such as { HEAD ~ SHA } 1
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH