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(27,28).
next(28,29).
next(29,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(34,35).
next(35,36).
next(36,37).
next(37,38).
next(38,39).
next(36,40).
next(40,41).
next(41,42).
next(35,43).
next(43,44).
next(44,45).
doAt(startflow,8).
doAt(a6,18).
doAt(a1,21).
doAt(a2,24).
doAt(a3,27).
doAt(a12,30).
doAt(a15,31).
doAt(a8,32).
doAt(a14,33).
doAt(a13,34).
doAt(a5,35).
doAt(a4,36).
doAt(a10,37).
doAt(endflow,38).
doAt(a11,40).
doAt(endflow,41).
doAt(a7,43).
doAt(endflow,44).
compAt(a2,x6,9).
compAt(a1,x6,10).
compAt(a6,x6,11).
compAt(a2,x1,12).
compAt(a1,x1,13).
compAt(a12,x4,14).
compAt(a3,x4,15).
compAt(a2,x4,16).
compAt(a1,x4,17).
compAt(a2,x6,19).
compAt(a1,x6,20).
compAt(a2,x6,23).
compAt(a12,x4,25).
compAt(a3,x4,26).
compAt(a15,x2,29).
subsAt(a2,22).
subsAt(a12,28).
leftrightnexts(37,40).
leftrightnexts(36,43).