Certainly, {TAIL ~ such games} are not designed for adjustability of {HEAD ~ the relative importance} played by chance and skill 
Certainly , { TAIL ~ such games } are not designed for adjustability of { HEAD ~ the relative importance } played by chance and skill
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH