#include <fstream>
#include <math.h>
#include <string.h>

using namespace std;

int main()
{
	int i,t,x1,x2,l;
	unsigned long long suma=0,a[102];
	char c[102];
	
	ifstream f("cifra.in");
	ofstream g("cifra.out");

	for(i=0; i<=99; i++)
		if(i%10%2==0 && i!=2 && i%100%4==0)
		{
			suma=suma+pow( (i%10),4 );
			a[i]=suma%10;
			suma=suma%10;
		}
		else
		{
			suma=suma+pow( (i%10),(i%4) );
			a[i]=suma%10;
			suma=suma%10;
		}
		
	f>>t;
	
	for(i=1; i<=t; i++)
	{
		f>>c;
		l=strlen(c);
		
		if(l==1) 
		x1=0;
		else
		x1=c[l-2]-'0';
		x2=c[l-1]-'0';
		
		g<<a[x1*10+x2]<<endl;
	}
}