#include <iostream>
using namespace std;
 
int num[5];
 
bool backtrack(int pos,long long value){
	if(pos==5 and value==23) return true;
	if(pos==5) return false;
	bool lol=false;
	for(int i=0;i<3;i++){
		if(i==0) lol=lol or backtrack(pos+1,value+num[pos]);
		if(i==1) lol=lol or backtrack(pos+1,value-num[pos]);
		if(i==2) lol=lol or backtrack(pos+1,value*num[pos]);
	}
	return lol;
}
 
int main() {
	while(true){
		int lol=0;
		for(int i=0;i<5;i++){
			cin>>num[i];
			lol+=num[i];
		}
		if(lol==0) break;
		if(backtrack(1,num[0])) puts("Possible");
		else puts("Impossible");
	}
}

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MSAxIDEgMSAxIAoxIDIgMyA0IDUgCjIgMyA1IDcgMTEgCjAgMCAwIDAgMA==

1 1 1 1 1 
1 2 3 4 5 
2 3 5 7 11 
0 0 0 0 0