the 3 main subgroups of the Aiguilles de Chamonix :
the left one is the Grepon (with the Charmoz, the Aiguille de la Republique and, in the lower part, the Aiguille de l'M)
the central one is the Blaitiere (with the Caiman, the Crocodile and the Fou)
the right one is the Plan with the ridge hosting the Pelerins and the Peigne