#include <iostream>
#include <cctype>
#include <cstring>

using namespace std;

int main()
{
    char s[256], voc[256]="aeiouAEIOU", aux[255], aux1[255];
    unsigned int i, j, g1, g2;
    g1=g2=0;
    cin.get (s, 256);
    cin.get();
    for (i=0; i<strlen(s); i++)
        if (strchr(voc, s[i]))
            g1=1;
        else g2=1;
    if (g1==1&&g2==1)
    {
    for (j=strlen (s)-1; j>=0; j--)
        if (!strchr(voc, s[j]))
            {
                strcpy (aux1, s+j);
                break;
            }
    for (i=0; i<strlen(s); i++)
        if (strchr(voc, s[i]))
            {
                strcpy (aux, s+i);
                break;
            }
    strcpy(s+i, aux1);
    strcpy(s+i+1, aux+1);
    strncpy(s+j, aux, 1);
    cout<<s;
    }
    else
        cout<<"IMPOSIBIL";
    return 0;

}