lost functions
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d
author: nelson d