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#include <iostream>
#include <math.h>
using namespace std;
string s;
double n,m;
int i=0,n1,z=0;
char x,y;
int main()
{
cin>>n;
if(n>0)
{  m=ceil(n/2)-1;
    n1=n;
  for(z=0; z<ceil(n/2); z++)
    cin>>s[z];
  if(n1%2!=0)
    m--;
    n--;
  while(x==y&&i<ceil(n/2))
  {
   x=s[m];
   cin>>y;
   m--;
   i++;
  }
}
else
  {
cin>>s;
n=s.length();
m=n;
while(x==y&&i<ceil(n/2))
{
    x=s[i];
    y=s[m-1];
    m--;
    i++;
}
}
if(i==ceil(n/2))
    cout<<"TAK";
else
    cout<<"NIE";

return(0);
}