#include <algorithm>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <cstdlib>
#include <climits>
#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <map>
 
using namespace std;
 
int M, N;
string s;
#define FOR(i, N) for(int i = 0; i < N; i++)
#define FOR1e(i, N) for(int i = 1; i <= N; i++)
#define REP(i, M, N) for(int i = M; i < N; i++)
#define REPe(i, M, N) for(int i = M; i <= N; i++)
#define sc(N) scanf("%d", &N)
#define scsc(M, N) scanf("%d %d", &M, &N)
#define gt(s) getline(cin, s)
#define ll long long
#define vi vector <int>
#define mp make_pair
#define pb push_back
#define mx 505
 
int arr[10], dp[10][505];
//505 because maximum positive = 50*5 = 250, minimum negative -250, so 250*2 values = 500 values
 
int fun(int i, int val){
	int &ret = dp[i][val];
	if(i == 5)
		return ret = val == 23;
	if(ret != -1)
		return ret;
	return ret = (fun(i+1, val+arr[i]) || fun(i+1, val-arr[i]) || fun(i+1, val*arr[i]));
}
 
int main(){
//	freopen("in.txt", "r", stdin);
	while(sc(arr[0]) != EOF){
		REP(i, 1, 5) sc(arr[i]);
		if(!arr[0] && !arr[1] && !arr[2] && !arr[3] && !arr[4]) break;
		sort(arr, arr+5);
		bool b = 0;
		do{
			memset(dp, -1, sizeof dp);
			if(fun(1, arr[0])) b = 1;
		}while(next_permutation(arr, arr+5) && !b);
		puts((b) ? "Possible":"Impossible");
	}
	return 0;
}

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1 1 1 1 1

1 2 3 4 5

2 3 5 7 11

0 0 0 0 0