YOU SAID:
THIS MAILBOX IS MINE UND THIS TRIAGONAL SIGN
INTO JAPANESE
このメールボックスはこの三角形のサイン
BACK INTO ENGLISH
This mailbox signs this triangle
INTO JAPANESE
このメールボックスはこの三角形に署名します
BACK INTO ENGLISH
This mailbox signs this triangle
That didn't even make that much sense in English.