Which book contains the earliest letters, Fear and Loathing in America or The Proud Highway?
return Fear and  Loathing in  America ;return The Proud Highway ;return letters of #1 ;return letters of #2 ;return when  was  #3 ;return when  was  #4 ;return which is the  lowest of #5 ,  #6
['select', 'select', 'project', 'project', 'project', 'project', 'comparison']