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(14,18).
next(18,19).
next(19,20).
next(20,21).
next(21,22).
next(22,23).
next(20,24).
next(24,25).
next(25,26).
next(8,27).
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(33,37).
next(37,38).
next(38,39).
next(39,40).
next(40,41).
next(41,42).
next(39,43).
next(43,44).
next(44,45).
next(4,46).
next(46,47).
next(47,48).
next(48,49).
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(59,63).
next(63,64).
next(64,65).
next(65,66).
next(66,67).
next(67,68).
next(65,69).
next(69,70).
next(70,71).
next(53,72).
next(72,73).
next(73,74).
next(74,75).
next(75,76).
next(76,77).
next(77,78).
next(78,79).
next(79,80).
next(80,81).
next(78,82).
next(82,83).
next(83,84).
next(84,85).
next(85,86).
next(86,87).
next(84,88).
next(88,89).
next(89,90).
doAt(startflow,3).
doAt(a5,4).
doAt(a10,5).
doAt(a9,6).
doAt(a16,7).
doAt(a22,8).
doAt(a23,9).
doAt(a8,10).
doAt(a24,11).
doAt(a18,12).
doAt(a13,13).
doAt(a15,14).
doAt(a14,15).
doAt(endflow,16).
doAt(a4,18).
doAt(a11,19).
doAt(a2,20).
doAt(a12,21).
doAt(endflow,22).
doAt(a19,24).
doAt(endflow,25).
doAt(a20,27).
doAt(a3,28).
doAt(a8,29).
doAt(a24,30).
doAt(a18,31).
doAt(a13,32).
doAt(a15,33).
doAt(a14,34).
doAt(endflow,35).
doAt(a4,37).
doAt(a11,38).
doAt(a2,39).
doAt(a12,40).
doAt(endflow,41).
doAt(a19,43).
doAt(endflow,44).
doAt(a21,46).
doAt(a25,47).
doAt(a17,48).
doAt(a6,49).
doAt(a7,50).
doAt(a9,51).
doAt(a16,52).
doAt(a22,53).
doAt(a23,54).
doAt(a8,55).
doAt(a24,56).
doAt(a18,57).
doAt(a13,58).
doAt(a15,59).
doAt(a14,60).
doAt(endflow,61).
doAt(a4,63).
doAt(a11,64).
doAt(a2,65).
doAt(a12,66).
doAt(endflow,67).
doAt(a19,69).
doAt(endflow,70).
doAt(a20,72).
doAt(a3,73).
doAt(a8,74).
doAt(a24,75).
doAt(a18,76).
doAt(a13,77).
doAt(a15,78).
doAt(a14,79).
doAt(endflow,80).
doAt(a4,82).
doAt(a11,83).
doAt(a2,84).
doAt(a12,85).
doAt(endflow,86).
doAt(a19,88).
doAt(endflow,89).
leftrightnexts(21,24).
leftrightnexts(15,18).
leftrightnexts(40,43).
leftrightnexts(34,37).
leftrightnexts(9,27).
leftrightnexts(66,69).
leftrightnexts(60,63).
leftrightnexts(85,88).
leftrightnexts(79,82).
leftrightnexts(54,72).
leftrightnexts(5,46).