Stuck on three! 12A Relating to geological epochof the tertiary period from around 23.3 million to 5.3 million years ago.(7). I have M?O???E. 3D Equestrian competition whose three-day form consists of dressage, cross-country and showjumping.(5) I have E???T. 43D Brand of motorised sledge (3-3) I have ?K?-D?O