YOU SAID:
I eat a petter in a petter
INTO JAPANESE
私はペッターでペッターを食べる
BACK INTO ENGLISH
I eat a petter with a petter
INTO JAPANESE
私はペッターとペッターを食べる
BACK INTO ENGLISH
I eat a petter and a petter
INTO JAPANESE
私はペッターとペッターを食べる
BACK INTO ENGLISH
I eat a petter and a petter
That didn't even make that much sense in English.