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(24,28).
next(28,29).
next(29,30).
next(30,31).
next(28,32).
next(32,33).
next(33,34).
doAt(startflow,6).
doAt(a3,13).
doAt(a15,14).
doAt(a12,16).
doAt(a6,18).
doAt(a7,19).
doAt(a9,20).
doAt(a11,21).
doAt(a1,22).
doAt(a14,23).
doAt(a8,24).
doAt(a2,25).
doAt(endflow,26).
doAt(a13,28).
doAt(a5,29).
doAt(endflow,30).
doAt(a4,32).
doAt(endflow,33).
compAt(a12,x7,7).
compAt(a15,x7,8).
compAt(a3,x7,9).
compAt(a6,x3,11).
compAt(a12,x3,12).
compAt(a12,x7,15).
subsAt(a3,10).
subsAt(a6,17).
leftrightnexts(29,32).
leftrightnexts(25,28).