riddle! quite difficult!!?

[rough]

A man's life was at an all time low. He lost his job, his wife, his house; and now his mom just died in a car accident. After the funeral, a man approached him and told him that his mom had taken a mortgage on the house and left him nothing except one thing. It was a note that read:

Dear my only son,

Thhaenrge! Tmhoe Bnaeckyyairsd

After he read the note, he finally got a smile on his face. What did his mom tell him in the note?



plz plz don't get it right! plz i wanna crack the riddle lol.. hey no if you wanna answer or know the answert then of course you can answer!

[lucky s,]

So mom was cleaver,and told her son don't worry,money is in back yard,and keep secret.