Est ce que ce dessin vous dit quelque chose? 
_______________________________
________|"""|_|"""|_|"""|_|"""|____________ /" " "\__
________|. . |_|. . |_|. . |_|. . |____________/ . . . . . . \
______/" " " " " " " " " " " " " " " " "\________/ " \ . . . . . . . \
_|" " " " " " " " " " " " " " " " " " " " " " " " " "/___/. . . . " " " \ . . . \
_| O " O " O " O " O " O " O " O " O " /___/ . . . . . . . . . \ . . .\
_|________________________/___/_________ \___\
Je l'ai trouvé sur le 15-18. 