David starts from Point Y and drives 17 km towards the North. He then takes a right turn, drives 37 km, turns right and drives 31 km. He then takes a right turn and drives 15 km. He takes a right turn, drives 43 km, turns right, drives 18 km, then turns right and drives 29 km to stop at Point Z. How far (shortest distance) and towards which direction should he drive in order to reach Point Y again? (All turns are 90 degrees turns only unless specified).