I am using wordpress twentyten theme.  

and in this i have set search widget. 

Now i want to customize my search option which look like,

![enter image description here](https://i.stack.imgur.com/biNkj.jpg)

and i want to chane it like,  

![enter image description here](https://i.stack.imgur.com/yZO0S.jpg)

Can any one tell me where i have to change?