LECON NR 17 EXERCICE NR 2 = LJYOR  YKPHQ  BPVRL  NZKTC  YLVGA  VXPGW  AIMGU  XPDVI  WIOEZ  NEPIZ  EORLW  XLWHZ  VCOID  BPJSL  OUDRC  IQKSJ  ZLQFB  XHMJE  KNYUJ  WSAQT  YMGCS  AJOHR  EKQGF  VHRDU  PEBST =