#include <stdio.h>

int sub(char *s){
	int i, len;
	int mod = 0;
	int minus = 0;
	for(len=0;s[len] != '\0';len++);
	
	for(i=len-1;i>0 ;i--){
		printf("%d\n", i);
		if(minus == 1){
			if(s[i] == '0'){
				s[i] = '9';
				minus = 1;
			}else{
				char num = (char)(s[i] - '0' - 1);
				s[i] = (char)(num+'0');
				minus = 0;
			}
		}else{
			
			if( s[i] == '0'){
				s[i] = '9';
				minus = 1;
			}else{
				char num = (char)(s[i] - '0' - 1);
				s[i] = (char)(num+'0');
			}
		}
		
		if(minus == 0){break;}
	}
	
	for(i=0;i<len;i++){
		mod = mod*10 + (int)(s[i]-'0');
		mod = mod%4;
	}
	
	return mod+1;
}

int main(void){
	int ans[10][5] = {
		{0, 0, 0, 0, 0},
		{0, 1, 1, 1, 1},
		{0, 2, 4, 6, 8},
		{0, 3, 9, 7, 1},
		{0, 4, 6, 4, 6},
		{0, 5, 5, 5, 5},
		{0, 6, 6, 6, 6},
		{0, 7, 9, 3, 1},
		{0, 8, 4, 2, 6},
		{0, 9, 1, 9, 1}
	};
	int num;
	int lenN, lenM;
	int mul;
	char n[10010];
	char m[10010];
	scanf("%s", n);
	scanf("%s", m);
	
	for(lenN=0;n[lenN] != '\0';lenN++);
	for(lenM=0;m[lenM] != '\0';lenM++);
	
	num = (int)(n[lenN-1]-'0');
	
	if( lenM == 1 ){
		mul = (int)((m[0]-'0'-1)%4+1);
	}else{
		mul = sub(m);
	}
	printf("%d\n", ans[num][mul]);
	
	return 0;
}