#include <iostream>
#include <cstring>
using namespace std;
int main()
{
char sir1[31],sir2[31];
cin.getline(sir1,31);
cin.getline(sir2,31);
if (strlen(sir1) < strlen(sir2))
cout << "imposibil";
else
{
for (unsigned i = 0;i < strlen(sir1);i ++)
{
unsigned j;
for (j = 0;j < strlen(sir2);j ++)
if (sir1[i + j] != sir2[j] && sir2[j] != '*')
break;
if (j == strlen(sir2))
{
for (j = 0;j < strlen(sir2);j ++)
cout << sir1[i + j];
return 0;
}
}
}
cout << "imposibil";
return 0;
}
