Constellations with just enough Letters

This is a different version of the Constellations quiz. For each constellation, you only have to type enough letters so that they are not also the starting letters of any other constellation. For example, if you took an imaginary quiz with three answers, namely Redland, Bluestan and Blackia, then R, BLU and BLA would be correct answers, but B and BL would not be, because they are starting letters of more than one answer. You have six minutes. Good luck!