给定两个自然数 $a$ 和 $b$，求 $a^b$ 的最后一位数字。
编写一个程序，完成以下任务：
- 读取底数 $a$ 和指数 $b$。
- 计算 $a^b$ 的最后一位数字。
- 输出结果。
输入格式
输入的第一行也是唯一一行包含两个整数 $a$ 和 $b$ ($1 \le a, b \le 1\,000\,000\,000$)，中间用空格隔开。
输出格式
你的程序应当仅输出 $a^b$ 的最后一位（最低位）数字。
样例
输入格式 1
2 3
输出格式 1
8
QOJ.ac
QOJ
时间限制： 1 s
内存限制： 16 MB
总分： 10
#11667. 你会乘方吗？
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