Sumesh starts walking in north direction from point P, after walking 10m he reached at point Q, then he takes right turn and walks 6m to reach at point R then again he takes right turn and walks 8m to reach point S. After that he takes left turn and walks 7m to reach point T and point U is 12m north of point T. Point V is 5m east of U. What is the shortest distance between T and V?