: !/bin/sh
# convert MMYYYY to YYYYxMM (TBSdata tBatch.BillingPeriod)
awk -v "MMYYYY=$1" -v "sep=$2" '
BEGIN {
	mm = 0 + substr(MMYYYY,1,2);
	yyyy = 0 + substr(MMYYYY,3,4);
	YYYYMM = sprintf("%04d%s%02d", yyyy, sep, mm);
	print YYYYMM
	exit
}'
exit 0