UNITY C# Input Field with a word that cannot be deleted

I'm pretty new to Unity. I'd like to create a mini-game. I wanted to ask if it's possible to create something like this using InputField and C#:

Example: http://ift.tt/2deGNpn

In this example "dog" is a random-generated word (from text file) which cannot be deleted but user can type in some "text" before and after "dog" to create a sentence. I want "dog" to be a part of InputField because I will use that InputField content later on.

Thanks