#!/usr/bin/env python

import sys

def middle(x, y, z):
    m = z;
    if y < z:
       if x < y:
	   m = y
       elif x < z:
	   m = y
    else:
        if x > y:
	    m = y
	elif x > z:
	    m = x

    return m

if __name__ == "__main__":
    x = sys.argv[1]
    y = sys.argv[2]
    z = sys.argv[3]
    m = middle(x, y, z)

    print "middle:", m