#include<fstream.h>
#include<math.h>
unsigned long i,n,t;
float a;
int main()
{ifstream f("cifra.in");
ofstream g("cifra.out");
f>>t;
for(i=1;i<=t;i++)
{f>>n;
a=(unsigned long)pow(n,n)%10;
g<<a;}
f.close();
g.close();
return 0;}