Mathematics · Direction Sense Test

Kumar starts from point A and walks 13 m towards north. He turns left, walks 8 m and then turns left again, walks 18 m, reaches point B and stops. Chitra starts walking from point Z, which is 11 m east of point B. She walks 12 m east, turns left, walks 23 m, turns left, and walks 15 m before stopping at point Y. What is the shortest distance between point A and point Y? (All turns are 90-degree turns only.)