YOU SAID:

she sells seashells on the sea shore, the shells that she sells are seashells for sure.

INTO JAPANESE

彼女は海岸で貝殻を売っていますが、彼女が売っている貝殻は確かに貝殻です。

BACK INTO ENGLISH

She sells shells on the beach, and the shells she sells are indeed seashells.

INTO JAPANESE

彼女は浜辺で貝殻を売っていますが、彼女が売っている貝殻は確かに貝殻です。

BACK INTO ENGLISH

She sells shells on the beach, and the shells she sells are indeed seashells.