: !/bin/sh
# MMYYYY
month=$1

#echo "$month"
#exit

YYYY=`echo "$month" | awk '{ print substr($1,3,4) }'`
MM=`echo "$month" | awk '{ print substr($1,1,2) }'`

awk -v "MM=$MM" -v "YYYY=$YYYY" 'BEGIN {
	if ( ++MM > 12 ) {
		MM = 1
		++YYYY
	}
	printf("%02d%04d\n", MM, YYYY)
	exit
}'

exit