#include <stdio.h>
FILE *f,*g;
int v[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 n,i,t;
int x,y,z;
char d;
int main(){
 f=fopen("cifra.in","r");
 g=fopen("cifra.out","w");
 fscanf(f,"%d\n",&t);
 for (i=1;i<=t;i++){
  d=' ';
  x=0;
  y=0;
  z=0;
  while (!feof(f)&&d!='\n'){
   fscanf(f,"%c",&d);
   x=y;
   y=z;
   z=d-48;
  }
  n=x*10+y;
 fprintf(g,"%d\n",v[n]);
 }
 fclose(f);
 fclose(g);
 return 0;
}