YOU SAID:

three little birds, sat on a window and they i dont know

INTO JAPANESE

3羽の小鳥が窓に座っていて知らない

BACK INTO ENGLISH

I don't know three little birds sitting in the window

INTO JAPANESE

窓際に座っている3羽の小鳥を知らない

BACK INTO ENGLISH

I don't know the three little birds sitting by the window

INTO JAPANESE

窓際に座っている三羽の小鳥がわからない

BACK INTO ENGLISH

I don't know the three little birds sitting by the window