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

const int v[10][10] = {
	{ 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 main()
{
	int t, aux, c1, c2,i;
	char n[101];

	freopen("cifra.in","r",stdin);
	freopen("cifra.out", "w",stdout);

	scanf("%d", &t );

	for(i = 1; i <= t; ++i ) {
		scanf("%s", n );
		aux= strlen( n );

		if( aux == 1 ) c1 = 0;
		else c1 = n[ aux - 2 ] - '0';
		c2 = n[ aux - 1 ] - '0';

		printf("%d\n", v[c1][c2] );
	}

	return 0;
}
  /*  freopen("cifra.in", "r", stdin);
    freopen("cifra.out", "w", stdout);

    int i, n, t,aux,c1,c2,l;
    char a[101];

    scanf("%d", &n);
    for(i=1;i<=n;i++)
    {
        scanf("%s",a);
        aux=strlen(a);

        if(aux==1)
            c1=0;
        else
        {
            c1=a[aux-2]-'0';
            c2=a[aux-1]-'0';
        }
        printf("%d\n", v[c1][c2]);
    }

    return 0;

}*/