next(1,2).
next(2,3).
next(3,4).
next(4,5).
next(5,6).
next(6,7).
next(7,8).
next(8,9).
next(9,10).
next(10,11).
next(11,12).
next(12,13).
next(13,14).
next(14,15).
next(15,16).
next(16,17).
next(17,18).
next(18,19).
next(19,20).
next(20,21).
next(21,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(20,28).
next(28,29).
next(29,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
doAt(startflow,7).
doAt(a7,9).
doAt(a15,14).
doAt(a6,15).
doAt(a11,16).
doAt(a3,17).
doAt(a12,18).
doAt(a1,19).
doAt(a8,20).
doAt(a13,21).
doAt(a14,22).
doAt(a4,23).
doAt(a9,24).
doAt(a5,25).
doAt(endflow,26).
doAt(a10,28).
doAt(a14,29).
doAt(a4,30).
doAt(a9,31).
doAt(a5,32).
doAt(endflow,33).
compAt(a11,x3,8).
compAt(a11,x15,11).
compAt(a15,x15,12).
compAt(a3,x9,13).
subsAt(a15,10).
leftrightnexts(21,28).