FB
record length= 50, the important field here is (31,2,CH)
----+----1----+----2----+----3----+----4----+----5
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX770001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX770001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX800001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX800001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX900001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX910001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX910001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX770001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX770001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX800001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX800001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX900001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX910001-01-01XXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXX-XX-XX910001-01-01XXXXXXXX
output, FB, record length, 42
----+----1----+----2----+----3----+----4--
77 80 90 91 92
CLIENTS 000002 000002 000001 000002 000000
77 80 90 91 92
CLIENTS 000002 000002 000001 000002 000000