LECON NR 7 LETTRES H Q P  EXERCICE NR 2 = HVPYX  QGCIH  PQTAN  QSVYC  HNOWP  QCXIE  SVPHS  QNTRK  OHSPR  MQXDH  IGHPZ  UQWPF  NTWQB  SXDRQ  ZNRKS  SIETH  OFSPW  YQHVP =