ad01 = 0 \u2013 100
ad02 = 101 \u2013 200
ad03 = 201 \u2013 300
ad04 = 301 \u2013 400
ad05 = 401 \u2013 500
ad06 = 501 \u2013 600
ad07 = 601 \u2013 700
ad08 = 701 \u2013 800
ad09 = 801 \u2013 900
ad10 = 901 \u2013 1000
ad11 = 1001 \u2013 1100
ad12 = 1101 \u2013 1200
ad13 = 1201 \u2013 1300
ad14 = 1301 \u2013 1400
ad15 = 1401 \u2013 1500
ad16 = 1501 \u2013 1600
ad17 = 1601 \u2013 1700
ad18 = 1701 \u2013 1800
a19a = 1801 \u2013 1850
a19b = 1851 \u2013 1900

