What is the shortest distance between person N and person S?

Read the following information carefully and answer the questions given below it: Nine people – M, N, O, P, Q, R, S, T and U were stood at some distance from each other in a grocery area. O was 18 m $ to that of N. M was 8 m % of that of N and T was 14 m # of that of
M. S was 10 m %@ of that of T while P was 20 m # of that of S and R was 10 m % of that of S. U was situated just in the middle of N and O while Q was just in the middle of S and P. Here, % means North, # means South, $ means East and @ means West %$ means North-East ,#@ means south-West. For example, X%$Y means Y is to the North-East of X Y%$X means X is to the North-East of Y