LECON NR 2 LETTRES M D X  EXERCICE NR 3 = EDTAX  NMARK  TEXMR  ADXTK  EAXMD  TEXNM  MNDXE  ANDTX  MRKET  KTAXD  ENMAT  RKMXD  ETNAX  DAERK  TEDXN  RMXEA  RMKAX NANDX =