vim段替换

文件中有很多字段：

dd ssdf df aaa="100"

dd ssdf df aaa="200" 

asdf sdf sdf aaa="700"

现在我就想替换dd ssdf df aaa="×××" 为dd ssdf df aaa="NUMBER"

%s/\(dd ssdf df\) aaa=\"[0-9]\{1,5\}\"/\1 aaa="NUMBER"/g