module main;

import std;

void main()
{
	// 入力
	auto N = readln.chomp;
	auto M = BigInt(readln.chomp);
	// 答えの計算と出力
	int X = N[$ - 1] - '0';
	final switch (X) {
	case 0:
	case 1:
		writeln(X);
		break;
	case 2:
		if (M == 0)
			writeln(1);
		else {
			auto arr = [6, 2, 4, 8];
			writeln(arr[M % 4]);
		}
		break;
	case 3:
		if (M == 0)
			writeln(1);
		else {
			auto arr = [1, 3, 9, 7];
			writeln(arr[M % 4]);
		}
		break;
	case 4:
		if (M == 0)
			writeln(1);
		else {
			auto arr = [6, 4];
			writeln(arr[M % 2]);
		}
		break;
	case 5:
	case 6:
		writeln(M == 0 ? 1 : X);
		break;
	case 7:
		if (M == 0)
			writeln(1);
		else {
			auto arr = [1, 7, 9, 3];
			writeln(arr[M % 4]);
		}
		break;
	case 8:
		if (M == 0)
			writeln(1);
		else {
			auto arr = [6, 8, 4, 2];
			writeln(arr[M % 4]);
		}
		break;
	case 9:
		if (M == 0)
			writeln(1);
		else {
			auto arr = [1, 9];
			writeln(arr[M % 2]);
		}
		break;
	}
}