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