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(12,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(30,31).
next(31,32).
next(25,33).
next(33,34).
next(34,35).
next(35,36).
next(36,37).
next(37,38).
next(38,39).
doAt(startflow,8).
doAt(a9,10).
doAt(a5,12).
doAt(a1,15).
doAt(a4,16).
doAt(a7,17).
doAt(a2,19).
doAt(a10,20).
doAt(endflow,21).
doAt(a12,23).
doAt(a6,25).
doAt(a3,27).
doAt(a7,28).
doAt(a2,29).
doAt(a10,30).
doAt(endflow,31).
doAt(a8,33).
doAt(a7,34).
doAt(a2,35).
doAt(a10,36).
doAt(endflow,38).
compAt(a2,x6,9).
compAt(a4,x9,11).
compAt(a1,x7,13).
compAt(a4,x1,14).
compAt(a2,x8,18).
compAt(a2,x10,24).
compAt(a1,x7,26).
compAt(a1,x7,37).
leftrightnexts(26,33).
leftrightnexts(13,23).
