#include <stdio.h>
#include <math.h>

int main(void) {
	int i, j;
	char n[10001], m[10001];
	int n2, m2;
	scanf("%s", n);
	scanf("%s", m);
	
	m2 = n[0] - '0';
	i = 1;
	while(m[i] != '\0'){
		m2 = m2 * 10 + m[i] - '0';
		m2 %= 4;
		i++;
	}
	//printf("%d\n", m2);
	j = 0;
	while(n[j] != '\0'){
		j++;
	}
	n2 = n[j - 1] - '0';
	
	//printf("%d^%d = %d\n", n2, m2, (int)pow(n2, m2) % 10);
	printf("%d\n", (int)pow(n2, m2) % 10);
	
	return 0;
}