US Presidents with just enough Letters: 2 Minute Sprint

This is a different, speed, version of the US Presidents. For each President, you only have to type enough letters of the surname so that they are not also the starting letters of any other President's surname. For example, if you took an imaginary quiz having 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 two minutes. Good luck!

Warning: this means that if two different Presidents share the same surname you'll have to type it fully!