Bob created MNO Inc. several years ago and has owned all 10 outstanding shares of MNO Inc. since the creation of MNO Inc. The fair market value of those shares is now $50,000. Bob's friend, Lee, owns a building having a fair market value of $80,000 and an adjusted basis to Lee of $20,000. The building is encumbered by a $30,000 mortgage. Earlier this month, Bob and Lee discussed Lee's becoming involved in the business of MNO Inc., and as a result of these discussions, Lee transferred the building to MNO Inc. and in exchange for the building, MNO Inc. transferred to Lee 10 shares of authorized but not previously issued stock of MNO Inc. After the transaction there were 20 shares of stock issued and outstanding. How much gain was realized and recognized by Lee as a result of this transaction?