The spell checker employs a dictionary wherein {HEAD ~ each word} of the dictionary has {TAIL ~ a signature} associated with the word to facilitate searching for substitute words 
has
The spell checker employs a dictionary wherein { HEAD ~ each word } of the dictionary has { TAIL ~ a signature } associated with the word to facilitate searching for substitute words
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH