APN

I had a quick guess, is No.1.
0 y3 Q4 A0 {& r, r1 i% d* F$ p; Xtvb now,tvbnow,bttvbBecause what ever he or she taken, the next person will take what ever had taken with +1 or -1 to ensure they havn't got the same number. at the end, no1 will had the most likely middle number and without a same number. of coz he will need to pick a number from 3 to 19.