#include <bits/stdc++.h>
using namespace std;
int main()
{
     char s[11],aux,aux1;
     char vocale[]="aeiou";
     cin.get(s,11);
     int i,ok=1,poz,poz1=-1,nr=0;
     for(i=0;i<strlen(s);i++)
     {
         if((s[i]=='u'  ||  s[i]=='U' || s[i]=='a' || s[i]=='A' || s[i]=='e' || s[i]=='E'  ||   s[i]=='o' || s[i]=='O'  ||  s[i]=='i' || s[i]=='I') && (ok==1)) {aux=s[i];poz=i;ok=0;}

     }

     for(i=0;i<strlen(s);i++)
     {

         if((s[i]!='u'  &&  s[i]!='U' && s[i]!='a' && s[i]!='A' && s[i]!='e' && s[i]!='E'  &&   s[i]!='o' && s[i]!='O'  &&  s[i]!='i ' && s[i]!='I')) {aux1=s[i];poz1=i;nr++;}
     }

      if(nr==0) cout<<"IMPOSIBIL";
      else
        {
             s[poz]=aux1;
     s[poz1]=aux;
          cout<<s;
     }


}