Each of the players at his turn can, if he elects to contribute to a word, generate {HEAD ~ a number} of {TAIL ~ chance} from a selected set of numbers 
Each of the players at his turn can , if he elects to contribute to a word , generate { HEAD ~ a number } of { TAIL ~ chance } from a selected set of numbers
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH