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#include <iostream>
#include <cmath>
#include <fstream>
#include<string.h>
using namespace std;
int main(){
int n;
ifstream inf("cifra.in");
inf>>n;
ofstream of("cifra.out");
long long s=0;
char r[101];
while(inf>>r)
{inf.get();
int x=r[strlen(r)-1]-48;
cout<<x;
for(int i=1; i<=x; i++)
{
switch(i%10)
{
case 1: s=(s+1)%10;break;
case 2: s=(s+4)%10;break;
case 3: s=(s+7)%10;break;
case 4: s=(s+6)%10;break;
case 5: s=(s+5)%10;break;
case 6: s=(s+6)%10;break;
case 7: s=(s+3)%10;break;
case 8: s=(s+6)%10;break;
case 9: s=(s+1)%10;break;
}
}
of<<s<<endl;
s=0;
}
inf.close();
of.close();
return 0;
}