Okay, Gerald Ford served 1 term from 1974 to 1977. John F. Kennedy served a partial term (because of his assassination) from 1961 to 1963. Richard Nixon served 1 full term as well as a partial second (because he resigned from office) from 1969 to 1974. Lyndon B Johnson served a partial term (because he was sworn in after Kennedy's assassination) and then a full term after that from 1963 to 1969.
So, you answer would be John F. Kennedy, Lyndon B. Johnson, Richard Nixon, then Gerald Ford.
His mission brought the Chinese into contact with the outposts of Hellenistic culture established by Alexander the Great, opened the way for exchanges of envoys between these Central Asian states and the Han, and led to the introduction into China of a superior breed of horses and new plants, such as grapes and alfalfa ...
