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(10,15).
next(15,16).
next(16,17).
next(17,18).
next(15,19).
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(26,30).
next(30,31).
next(31,32).
next(32,33).
next(30,34).
next(34,35).
next(35,36).
next(36,37).
next(37,38).
next(38,39).
next(6,40).
next(40,41).
next(41,42).
next(42,43).
next(43,44).
next(44,45).
next(45,46).
next(46,47).
next(47,48).
next(44,49).
next(49,50).
next(50,51).
next(51,52).
next(49,53).
next(53,54).
next(54,55).
next(55,56).
next(56,57).
next(57,58).
next(58,59).
next(59,60).
next(60,61).
next(61,62).
next(62,63).
next(60,64).
next(64,65).
next(65,66).
next(66,67).
next(64,68).
next(68,69).
next(69,70).
next(70,71).
next(71,72).
next(72,73).
doAt(startflow,5).
doAt(a8,6).
doAt(a11,7).
doAt(a25,9).
doAt(a13,10).
doAt(a6,11).
doAt(a1,12).
doAt(endflow,13).
doAt(a9,15).
doAt(a2,16).
doAt(endflow,17).
doAt(a3,19).
doAt(a12,20).
doAt(a23,21).
doAt(a14,22).
doAt(a16,23).
doAt(a4,24).
doAt(a7,25).
doAt(a19,26).
doAt(a10,27).
doAt(endflow,28).
doAt(a17,30).
doAt(a5,31).
doAt(endflow,32).
doAt(a20,34).
doAt(a18,35).
doAt(a21,36).
doAt(a22,37).
doAt(endflow,38).
doAt(a24,40).
doAt(a25,43).
doAt(a13,44).
doAt(a6,45).
doAt(a1,46).
doAt(endflow,47).
doAt(a9,49).
doAt(a2,50).
doAt(endflow,51).
doAt(a3,53).
doAt(a12,54).
doAt(a23,55).
doAt(a14,56).
doAt(a16,57).
doAt(a4,58).
doAt(a7,59).
doAt(a19,60).
doAt(a10,61).
doAt(endflow,62).
doAt(a17,64).
doAt(a5,65).
doAt(endflow,66).
doAt(a20,68).
doAt(a18,69).
doAt(a21,70).
doAt(a22,71).
doAt(endflow,72).
compAt(a11,x25,42).
subsAt(a25,8).
subsAt(a25,41).
leftrightnexts(31,34).
leftrightnexts(27,30).
leftrightnexts(16,19).
leftrightnexts(11,15).
leftrightnexts(65,68).
leftrightnexts(61,64).
leftrightnexts(50,53).
leftrightnexts(45,49).
leftrightnexts(7,40).