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(8,12).
next(12,13).
next(13,14).
next(14,15).
next(15,16).
next(13,17).
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(12,26).
next(26,27).
next(4,28).
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(39,40).
next(37,41).
next(41,42).
next(42,43).
next(43,44).
next(44,45).
next(42,46).
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(41,55).
next(55,56).
next(28,57).
next(57,58).
next(58,59).
next(59,60).
next(60,61).
next(61,62).
next(62,63).
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(71,72).
next(72,73).
next(70,74).
next(74,75).
next(75,76).
next(76,77).
next(77,78).
next(78,79).
next(79,80).
next(80,81).
next(81,82).
next(69,83).
next(83,84).
doAt(startflow,3).
doAt(a4,4).
doAt(a5,5).
doAt(a16,6).
doAt(a3,7).
doAt(a15,8).
doAt(a6,9).
doAt(endflow,10).
doAt(a2,12).
doAt(a11,13).
doAt(a10,14).
doAt(endflow,15).
doAt(a21,17).
doAt(a24,18).
doAt(a14,19).
doAt(a25,20).
doAt(a7,21).
doAt(a23,22).
doAt(a22,23).
doAt(endflow,24).
doAt(endflow,26).
doAt(a18,28).
doAt(a13,29).
doAt(a1,30).
doAt(a17,31).
doAt(a12,32).
doAt(a20,33).
doAt(a8,34).
doAt(a16,35).
doAt(a3,36).
doAt(a15,37).
doAt(a6,38).
doAt(endflow,39).
doAt(a2,41).
doAt(a11,42).
doAt(a10,43).
doAt(endflow,44).
doAt(a21,46).
doAt(a24,47).
doAt(a14,48).
doAt(a25,49).
doAt(a7,50).
doAt(a23,51).
doAt(a22,52).
doAt(endflow,53).
doAt(endflow,55).
doAt(a19,57).
doAt(a1,58).
doAt(a17,59).
doAt(a12,60).
doAt(a20,61).
doAt(a8,62).
doAt(a16,63).
doAt(a3,64).
doAt(a15,65).
doAt(a6,66).
doAt(endflow,67).
doAt(a2,69).
doAt(a11,70).
doAt(a10,71).
doAt(endflow,72).
doAt(a21,74).
doAt(a24,75).
doAt(a14,76).
doAt(a25,77).
doAt(a7,78).
doAt(a23,79).
doAt(a22,80).
doAt(endflow,81).
doAt(endflow,83).
leftrightnexts(14,17).
leftrightnexts(13,26).
leftrightnexts(9,12).
leftrightnexts(43,46).
leftrightnexts(42,55).
leftrightnexts(38,41).
leftrightnexts(71,74).
leftrightnexts(70,83).
leftrightnexts(66,69).
leftrightnexts(29,57).
leftrightnexts(5,28).