Five pencils of different colors (Red, Blue, Green, Yellow, Black) are placed in a row on a table.

1. The Green pencil is between the Red and Blue pencils.
2. The Yellow pencil is at one of the ends.
3. The Black pencil is next to the Blue pencil.
4. The Red pencil is not at the ends.

Question: Which pencil is at the other end (the end that is NOT Yellow)?