Each set can include {HEAD ~ a substantial number} of identity cards to allow participation of a large number of players for one game or a smaller number of players for many rounds of {TAIL ~ play} 
Each set can include { HEAD ~ a substantial number } of identity cards to allow participation of a large number of players for one game or a smaller number of players for many rounds of { TAIL ~ play }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL