Direction: Study the following information carefully to answer the question given below:

Raman and Raghav live in the same house, Early morning Raman leaves the house and walks for 5 km following his own shadow, then he turns 90º clockwise and walks for 10 km, finally he turns 90º anticlockwise and walks for 7 km. Same-day in the evening Raghav leaves the house and walks for 7 km following his own shadow then turns to his left and walks for 6 km, finally he takes a 90º clockwise turn and walks for 9km.

What is the shortest distance between the end points of Raman and Raghav?