#include <stdio.h>
#include <string.h>

int main(){

FILE *file1, *file2;

char number[101];
int T, tail, len, period[100] =
{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, 0};

file1 = fopen("cifra.in", "r");
file2 = fopen("cifra.out", "w");

fscanf(file1, "%d", &T);

while(T>0){

fscanf(file1, "%s", number);
len = strlen(number);

if(len>1)
tail = (number[len-1] - '0') + (number[len-2] - '0') * 10;
else tail = (number[len-1] - '0');

if(!tail || tail==100)
fprintf(file2, "%c\n", '0');
else
fprintf(file2, "%c\n", period[tail-1]+'0');

T--;
}
return 0;
}