#!/usr/bin/python3

import sys

try:
   user = open("user.txt", "r")
except:
    print ("Fichier utilisateur inconnu")
else:
    line = user.readline ()
    maligne = line.rstrip()
   # print (line)

    while maligne:
        (login, complet) = maligne.split(":")
        print (login)
        print (complet)
        line = user.readline()
        maligne = line.rstrip()
        #print (line)

    user.close()