The card contains {TAIL ~ a memory} for storing PIN data of a predetermined number of {HEAD ~ characters} 
The card contains { TAIL ~ a memory } for storing PIN data of a predetermined number of { HEAD ~ characters }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD