#include<stdio.h>
int main()
{
	char n[10004], m[10004];
	scanf("%s%s", n, m);
	int ln, lm;
	for (ln = 0; n[ln] != '\0'; ln++);
	for (lm = 0; m[lm] != '\0'; lm++);
	int nn, mm;
	nn = n[ln - 1] - '0';
	if (lm == 1)
		mm = m[0] - '0';
	else
		mm = 10 * (m[lm - 2] - '0') + (m[lm - 1] - '0');
	int res = nn;
	for (; mm > 1; mm--)
		res = res * nn % 10;
	printf("%d\n", res);
	return 0;
}