Please list all the biwords pairs with "àbac" as its first word.
àbac refers to word = 'àbac'; first word refers to w1st
SELECT T1.word AS W1, T3.word AS W2 FROM words AS T1 INNER JOIN biwords AS T2 ON T1.wid = T2.w1st INNER JOIN words AS T3 ON T3.wid = T2.w2nd WHERE T1.word = 'àbac'