A recreational vehicle slide out roof block prevents foreign material such as water, dirt, or debris from accumulating on a recreational vehicle slide out roof. The solution is then treated in a thermal reaction to reduce viscosity and then fractionated to recover the bitumen. Third, fourth and fifth panels are provided. Message passing techniques are adapted to enable computation of updated skill beliefs to be obtained quickly even in the case of multiple teams of multiple players. 0 \u03bcm thick and its surface dislocation density is less than 106cm2.