# just in windows
import os
 
var = os.popen("getmac /NH /FO csv").read()
#print var

macList = []
for line in var.split("\n") : 
    #print line.split(',')[0][1:-1]    
    macAddrTmp = line.split(',')[0][1:-1]
    if macAddrTmp not in macList : macList.append(macAddrTmp)

for macAddr in macList:print macAddr
    
raw_input("Press Enter to continue")