How many is the difference in Manipuri and the number of ships in the fleet?
return Manipuri ;return the  fleet ;return ships of #1 ;return ships of #2 ;return number of  #3 ;return number of  #4 ;return the  difference of #5 and  #6
['select', 'select', 'project', 'project', 'aggregate', 'aggregate', 'arithmetic']