#include<bits/stdc++.h>

using namespace std;

int t;
string n;
int a[100]={
		0,1,5,2,8,3,9,2,8,7,7,8,4,7,3,8,4,1,5,4,4,5,9,6,2,7,3,6,2,1,1,2,8,1,7,2,8,5,9,8,8,9,3,0,6,1,7,0,6,5,5,6,2,5,1,6,2,9,3,2,2,3,7,4,0,5,1,4,0,9,9,0,6,9,5,0,6,3,7,6,6,7,1,8,4,9,5,8,4,3,3,4,0,3,9,4,0,7,1,0
    };
int b[100]={
		0,1,4,7,6,5,6,3,6,9,0,1,6,3,6,5,6,7,4,9,
		0,1,4,7,6,5,6,3,6,9,0,1,6,3,6,5,6,7,4,9,
		0,1,4,7,6,5,6,3,6,9,0,1,6,3,6,5,6,7,4,9,
		0,1,4,7,6,5,6,3,6,9,0,1,6,3,6,5,6,7,4,9,
		0,1,4,7,6,5,6,3,6,9,0,1,6,3,6,5,6,7,4,9
    };
int main(){
	ifstream fin("cifra.in");
	ofstream fout("cifra.out");
	fin>>t;
	for(int i=1;i<=t;i++){
	    fin>>n;
	    if(n.length()==1) fout<<a[int(n[n.length()-1]-48)]<<endl; else{
	    //for(int i=19;i<=(int(n[n.length()-2]-48)*10+int(n[n.length()-1]-48));i++){
	    //    a[i]=(b[i]+a[i-1])%10;
	    //}
	    //fout<<a[int(n[n.length()-2]-48)*10+int(n[n.length()-1]-48)]<<',';
	    //}
	    fout<<a[int(n[n.length()-2]-48)*10+int(n[n.length()-1]-48)]<<endl;
	    }
	}
return 0;
}