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#include <bits/stdc++.h>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
long long n,e,i,b,j,u[101],k,p;
string s;
int main()
{
f>>n;
for(i=1;i<=100;i++)
{
e++;
if(e==5)
e=1;
b++;
if(b==10)
b=0;
p=1;
for(j=1;j<=e;j++)
p*=b;
u[i]=p%10;
}
for(;n;n--)
{
f>>s;
k=s.size();
i=s[k-1]-'0';
if(k>1)
i+=10*(s[k-1]-'0');
g<<u[i]<<'\n';
}
return 0;
}