#include <iostream>
using namespace std;
int main()
{
unsigned long long N,num;
unsigned int ret;
cin >> N;
for(int i = 0;i<N;i++){
ret = 1;
cin >> num;
for(unsigned int i = 1; i <= num; ++i){
ret *= i;
}
cout << ret%10<<endl;
}
return 0;
}
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