Var80_SII_Ex5

#include <iostream>
#include <cstring>
using namespace std;
char sir[101], aux, voc, con;
int main ()
{
    int i, n, nr_voc=0, pozc, pozv;
    cin>>sir;
    n=strlen(sir);
    for (i=0; i<=n; i++)
    {
        if (strchr("aeiouAEIOU", sir[i])==0)
        {
            con=sir[i];
            break;
        }
    }
    for (i=0; i<=n; i++)
    {
        if (strchr("aeiouAEIOU", sir[i])!=0)
        {
            voc=sir[i];
            nr_voc++;
        }
    }
    if (nr_voc==0 || nr_voc==n)
    {
        cout<<"IMPOSIBIL";
    }
    else
    {
        pozc=strchr(sir, con)-sir;
        pozv=strchr(sir, voc)-sir;
        aux=sir[pozc];
        sir[pozc]=sir[pozv];
        sir[pozv]=aux;
        cout<<sir;
    }
    return 0;
}