#include <iostream>
#include <string.h>
using namespace std;
int main()
{
char cuv[21], voc[]="AEIOUaeiou", aux;
int pv=-1, pc=-1, i;
cin>>cuv;
for(i=0;i<strlen(cuv);i++)
if(!strchr(voc,cuv[i])){
pc=i; break;
}
for(i=strlen(cuv)-1;i>=0;i--)
if(strchr(voc,cuv[i])){
pv=i; break;
}
if(pv!=-1 && pc!=-1){
aux=cuv[pc]; cuv[pc]=cuv[pv]; cuv[pv]=aux;
cout<<cuv;
}
else cout<<"Imposibil";
return 0;
}