What am i

Take away my letters...

Riddle:

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?
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I live in my little house all alone...

Riddle:

I live in my little house all alone. There are no windows or doors, and if I want to go out I have to break through the wall. What am I?
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