wb4: Started Tue Feb 5 13:02:53 AEDST 2013
MMYYYY = [112012]
112012 - billperiod = [Nov_2012]
gawk: wb4.awk:34: warning: escape sequence `\.' treated as plain `.'
2110577 blocks

real 23:09:14.77
user 13:27:05.18
sys   8:47:01.99