T52e, 4th problem

GCHQ -  Eastcote                                 31° 57N,    35° 56 E

                          1st february 1949.

Dear Mr Michael Cum,

We have just intercepted a message from our French ally.
Can you try to dechiper it?

Hint: before sending the first message of the day, the French
telegraphers (ALBERT and PIERRE) chat after adjusting the
key. They reset the message key after each sentence. We know a
few problable  words:  MESSAGE, RECOI, ENVOI.

From another message we have deduced the Inner setting:
"II,IV,III,9,3,5,7,I,V,1"

Hug Alexander, H section chief,

NYDQ3WDKQV8I8JJBY+DJE33NKKZ+DRKIZT+ZP

O+LWEG+BBLFEU+JHCQSHPCPAKK4++D3O3JUHC/TQVSJIXPDQX

NYEEPVEQ4SDEEGJZ999WUSJVHRK8T33RCH/X

NZZQCRBQP4/T3WXZAOOWUM/WYZUXYWFN8R9QLLFGH

+CLAHER3QDDDQN/3AEDJY4RGJZUX4ZXJZTLHBMQIRXICAZHX

O+LATFMS8T/KC3DHIWAJR33NEUD8QD3Y/KXMVYA8V+WWWNZZFD
OONXJ/RSI8ECMCQVTDNZ9T8RT9RSVPRJYPBSVQ4F8+HHTPZBBJ
ZI3JPKMXAOPJE9YYYL8C4UAGPWB9CKGJUTDARD/CGYQ34B4UW/
9YUFWEALECKZFXKMU+DS8+F8KB3JYFHRQIGCTBLFRN/LSINK3+
RH+SWAKTJXHJGQYZLO8L4GCCFA+VLDY8WA+XP+KFE4YYK3XMJK
MTD8ZKFPBVFLOWDH3CIAEMPYLYHZRUAAW3TSG+BHCKXZSXGKUW
4XZGWSLHGHVCZDYD9IHACQADKPQ84F8TD8C+CSAWCFTBDYJ4S