for line in $(cat nowcoder.txt); do
num=$(echo $line | grep -o "[0-9]" | wc -l)
if [ $num -eq 1 ]; then
echo $line
fi
done
for line in $(cat nowcoder.txt); do
num=$(echo $line | grep -o "[0-9]" | wc -l)
if [ $num -eq 1 ]; then
echo $line
fi
done