const rl=require("readline").createInterface(process.stdin,process.stdout);
rl.once("line",s=>{
	var [perfect,great,good,miss]=s.split(/ /).map(v=>0|v);
	if(10<=miss) console.log("Impossible");
	else{
		console.log("Possible");
		var score=0;
		var combo=0;
		for(var i=0;i<great;i++){
			score+=50*2**(0|combo/100);
			combo++;
		}
		for(var i=0;i<perfect;i++){
			score+=100*2**(0|combo/100);
			combo++;
		}
		console.log(score);
	}
	process.exit();
})