siruri pb4

#include<iostream>
#include<cstring>
using namespace std;
char a[100];
int main()
{
    int st,dr,ok,n;
    st=0;
    dr=n;
    ok=0;
    n=strlen(a)-1;
    while (st<dr)
    {
        if(a[st]!=a[dr])
        {
            ok++;
            break;
        }
        dr--;
        st++;
    }
    if(ok=0)
    {
        cout<<DA;
    }
        else
        {


            cout<<NU;
        }

}