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

int main(){

    int solutiibrute[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
    };

    FILE *fin, *fout;
    fin = fopen("cifra.in","r");
    fout = fopen("cifra.out","w");

    int t,n;
    char n_mare[101];

    fscanf(fin,"%d",&t);
    for (int i = 0; i < t; i++){

        fscanf(fin,"%s",&n_mare);

        if (strlen(n_mare) > 1 ) n = (n_mare[strlen(n_mare) - 2] - '0') * 10 + (n_mare[strlen(n_mare) - 1] - '0');
        else n = n_mare[strlen(n_mare) - 1] - '0';

        fprintf(fout,"%d\n",solutiibrute[n]);
    }

    fclose(fin);
    fclose(fout);
    return 0;
}