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Anju starts from Lucknow and drives 18 km towards west. She then takes a right turn, drives 14 km, turns right again and drives 9 km. She takes a final right turn, drives 2 km and stops at Point F. What is the shortest distance between Point F and Lucknow?

Roshni starts from Chennai and drives 10 km towards east. She then takes a right turn, drives 15 km, turns right again and drives 13 km. She then takes a right turn and drives 19 km. She takes a final right turn, drives 6 km and stops at Point Z. What is the shortest distance between Point Z and Chennai?