YOU SAID:
I like eli he is the coolest
INTO JAPANESE
彼が一番かっこいいeliが好き
BACK INTO ENGLISH
He likes the coolest eli
INTO JAPANESE
彼はクールなエリが好き
BACK INTO ENGLISH
He likes cool eri
INTO JAPANESE
彼はクールなエリが好きです
BACK INTO ENGLISH
He likes cool eri
That didn't even make that much sense in English.