1 #include<cstdio>
 2 #include<cstring>
 3 #include<algorithm>
 4 #include<functional>
 5 #include<iostream>
 6 using namespace std;
 7 int str[120];
 8 int main()
 9 {
10   int n,i,res;
11   while(scanf("%d",&n)!=EOF)
12   {
13       res=10;
14       for(i=0;i<n;i++)
15     {
16        scanf("%d",&str[i]);
17       if(str[i]&1==1&&res>str[i])
18           res=str[i];
19     }
20     if(res==10){
21         printf("-1\n");
22         continue;
23     }
24     sort(str,str+n,greater<int>());
25      int fir=-1,st=res;
26     for(i=0;i<n;i++)
27     {
28         if(res==str[i]) res=-1;
29         else
30         {
31             fir=str[i];
32             break;
33         }
34     }
35     if(fir==0) printf("-1\n");
36     else
37     {
38         if(fir!=-1)
39           printf("%d",fir);
40         for( i++; i<n;i++)
41         if(res==str[i])res=-1;
42         else
43          printf("%d",str[i]);
44         printf("%d\n",st);
45     }
46   }
47   return 0;
48 }