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(7,11).
next(11,12).
next(12,13).
next(13,14).
next(11,15).
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(31,32).
next(32,33).
next(30,34).
next(34,35).
next(35,36).
next(36,37).
next(5,38).
next(38,39).
next(39,40).
next(40,41).
next(41,42).
next(42,43).
next(40,44).
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(52,53).
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(58,63).
next(63,64).
next(64,65).
next(65,66).
next(66,67).
next(67,68).
next(68,69).
next(65,70).
next(70,71).
next(71,72).
next(72,73).
next(73,74).
doAt(startflow,4).
doAt(a7,5).
doAt(a19,6).
doAt(a8,7).
doAt(a20,8).
doAt(endflow,9).
doAt(a9,11).
doAt(a5,12).
doAt(endflow,13).
doAt(a23,15).
doAt(a14,16).
doAt(a2,17).
doAt(a6,18).
doAt(a24,19).
doAt(a3,20).
doAt(a16,21).
doAt(a13,22).
doAt(a15,23).
doAt(a21,24).
doAt(a4,25).
doAt(endflow,26).
doAt(a18,28).
doAt(a25,29).
doAt(a11,30).
doAt(a12,31).
doAt(endflow,32).
doAt(a22,34).
doAt(a10,35).
doAt(endflow,36).
doAt(a17,39).
doAt(a8,40).
doAt(a20,41).
doAt(endflow,42).
doAt(a9,44).
doAt(a5,45).
doAt(endflow,47).
doAt(a23,49).
doAt(a14,50).
doAt(a2,51).
doAt(a6,52).
doAt(a24,53).
doAt(a3,54).
doAt(a16,55).
doAt(a13,56).
doAt(a15,57).
doAt(a21,58).
doAt(a4,59).
doAt(endflow,61).
doAt(a18,63).
doAt(a25,64).
doAt(a11,65).
doAt(a12,67).
doAt(endflow,68).
doAt(a22,70).
doAt(a10,71).
doAt(endflow,73).
compAt(a19,x15,38).
compAt(a19,x21,46).
compAt(a19,x21,60).
compAt(a19,x21,66).
compAt(a19,x21,72).
leftrightnexts(31,34).
leftrightnexts(25,28).
leftrightnexts(12,15).
leftrightnexts(8,11).
leftrightnexts(66,70).
leftrightnexts(59,63).
leftrightnexts(45,49).
leftrightnexts(41,44).
leftrightnexts(6,38).