How many months did Siam invade the Tenasserim coast before retreating?
return Siam invade the  Tenasserim coast ;return Siam retreat ;return months of #1 ;return month of #2 ;return the  lowest of #3 ;return the  difference of #4 and  #5
['select', 'select', 'project', 'project', 'aggregate', 'arithmetic']