from decimal import Decimal, getcontext


def solve():
    N = input()
    M = input()

    n = Decimal(N[-1])
    m = Decimal(M)

    if m == 0:
        print(1)
        return

    ctx = getcontext()

    ans = ctx.power(n, m, 10)

    print(ans)


if __name__ == '__main__':
    solve()