YOU SAID:
my thirteen chairs are very unsatisfied
INTO JAPANESE
私の13の椅子は非常に満足していません
BACK INTO ENGLISH
My 13 chairs are not very happy
INTO JAPANESE
私の13の椅子はとても幸せではありません
BACK INTO ENGLISH
My 13 chairs are not so happy
INTO JAPANESE
私の13人の椅子はそれほど幸せではありません
BACK INTO ENGLISH
My 13 chairs are not so happy
Come on, you can do better than that.