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(16,20).
next(20,21).
next(21,22).
next(15,23).
next(23,24).
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(36,37).
next(37,38).
next(35,39).
next(39,40).
next(40,41).
next(34,42).
next(42,43).
next(43,44).
next(44,45).
next(27,46).
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(55,59).
next(59,60).
next(60,61).
next(54,62).
next(62,63).
next(63,64).
next(64,65).
next(47,66).
next(66,67).
next(67,68).
next(68,69).
next(69,70).
next(70,71).
next(71,72).
next(72,73).
next(73,74).
next(74,75).
next(75,76).
next(76,77).
next(77,78).
next(75,79).
next(79,80).
next(80,81).
next(74,82).
next(82,83).
next(83,84).
next(84,85).
doAt(startflow,3).
doAt(a15,5).
doAt(a10,6).
doAt(a1,7).
doAt(a8,8).
doAt(a21,9).
doAt(a25,10).
doAt(a12,11).
doAt(a11,12).
doAt(a3,13).
doAt(a5,14).
doAt(a18,15).
doAt(a17,16).
doAt(a16,17).
doAt(endflow,18).
doAt(a23,20).
doAt(endflow,21).
doAt(a24,23).
doAt(a14,24).
doAt(endflow,25).
doAt(a4,27).
doAt(a6,28).
doAt(a25,29).
doAt(a12,30).
doAt(a11,31).
doAt(a3,32).
doAt(a5,33).
doAt(a18,34).
doAt(a17,35).
doAt(a16,36).
doAt(endflow,37).
doAt(a23,39).
doAt(endflow,40).
doAt(a24,42).
doAt(a14,43).
doAt(endflow,44).
doAt(a7,46).
doAt(a2,47).
doAt(a13,48).
doAt(a25,49).
doAt(a12,50).
doAt(a11,51).
doAt(a3,52).
doAt(a5,53).
doAt(a18,54).
doAt(a17,55).
doAt(a16,56).
doAt(endflow,57).
doAt(a23,59).
doAt(endflow,60).
doAt(a24,62).
doAt(a14,63).
doAt(endflow,64).
doAt(a19,66).
doAt(a9,67).
doAt(a22,68).
doAt(a25,69).
doAt(a12,70).
doAt(a11,71).
doAt(a3,72).
doAt(a5,73).
doAt(a18,74).
doAt(a17,75).
doAt(a16,76).
doAt(endflow,77).
doAt(a23,79).
doAt(endflow,80).
doAt(a24,82).
doAt(a14,83).
doAt(endflow,84).
subsAt(a15,4).
leftrightnexts(17,20).
leftrightnexts(16,23).
leftrightnexts(36,39).
leftrightnexts(35,42).
leftrightnexts(56,59).
leftrightnexts(55,62).
leftrightnexts(76,79).
leftrightnexts(75,82).
leftrightnexts(48,66).
leftrightnexts(28,46).
leftrightnexts(9,27).