Hmm just done a few quick tests.

Tried a number of dates from DXB - MAN, and they all have shown:
F/4 A/4
J/7 C/7 I/7 O/7
Y/9 E/9 R/9 W/9 M/9 B/9 U/9 K/9 H/0 Q/9 L/9 T/9 V/9 X/9

Hmmm, that can't be right. Not for every flight surely