vr 24 pr5

#include <iostream>
#include <string.h>
using namespace std;

int main()
{

    char a[20], b[20], c[20]="";
    int n, m, i, j, k=0;
    cin.get(a,20);
    cin.get();
    cin.get(b, 20);
    n=strlen(a);
    m=strlen(b);
    i=n-1;
    j=m-1;
    while(a[i]==b[j])
    {
        c[k]=a[i];
        k++;
        i--;
        j--;
    }
    if(c[0]==NULL)
       cout<<"NU EXISTA";
    else
        for(i=k-1; i>=0; i--)
            cout<<c[i];

    return 0;
}