在 Linux 中有一个名为 test 的文件，内容如下所示：
Hi, Today is Friday. Hello, Hi? Today is Monday. Hello, Today is Thursday. Hi, Today is Sunday. Hello, Today is Thursday. Hello, Today ... Hi, Today ... ...则执行下面 Shell 脚本的结果是（）
sed -n '/Hello/s/Today/123/p' test | grep -v "\.\.\." | awk -F, '{print $2}' | awk '{print $1}' | grep -oE '[a-zA-Z1-9]' | wc -l
