shell 练习-查找字母数小于6的单词

bash for循环打印下面这句话中字母数不大于6的单词。

Bash also interprets a number of multi-character options.

#!/bin/bash
for s in Bash also interprets a number of multi-character options
do
    n=`echo $s|wc-c`
    if [ ! $n -gt 6 ]
    then
        echo $s
    fi
done