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(14,15).
next(15,16).
next(16,17).
next(17,18).
next(15,19).
next(19,20).
next(20,21).
next(21,22).
next(5,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
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(37,38).
next(38,39).
next(39,40).
next(40,41).
next(38,42).
next(42,43).
next(43,44).
next(44,45).
next(26,46).
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(51,55).
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(47,67).
next(67,68).
next(68,69).
next(69,70).
next(70,71).
next(71,72).
next(72,73).
next(73,74).
next(71,75).
next(75,76).
next(76,77).
next(77,78).
next(78,79).
next(79,80).
next(80,81).
next(81,82).
next(79,83).
next(83,84).
next(84,85).
next(85,86).
doAt(startflow,4).
doAt(a25,5).
doAt(a22,6).
doAt(a3,7).
doAt(a16,8).
doAt(endflow,9).
doAt(a15,11).
doAt(a12,12).
doAt(a11,13).
doAt(a23,14).
doAt(a8,15).
doAt(a24,16).
doAt(endflow,17).
doAt(a6,19).
doAt(a1,20).
doAt(endflow,21).
doAt(a17,23).
doAt(a21,24).
doAt(a10,25).
doAt(a5,26).
doAt(a4,27).
doAt(a14,28).
doAt(a13,29).
doAt(a3,30).
doAt(a16,31).
doAt(endflow,32).
doAt(a15,34).
doAt(a12,35).
doAt(a11,36).
doAt(a23,37).
doAt(a8,38).
doAt(a24,39).
doAt(endflow,40).
doAt(a6,42).
doAt(a1,43).
doAt(endflow,44).
doAt(a2,46).
doAt(a19,47).
doAt(a20,48).
doAt(a14,49).
doAt(a13,50).
doAt(a3,51).
doAt(a16,52).
doAt(endflow,53).
doAt(a15,55).
doAt(a12,56).
doAt(a11,57).
doAt(a23,58).
doAt(a8,59).
doAt(a24,60).
doAt(endflow,61).
doAt(a6,63).
doAt(a1,64).
doAt(endflow,65).
doAt(a7,67).
doAt(a9,68).
doAt(a14,69).
doAt(a13,70).
doAt(a3,71).
doAt(a16,72).
doAt(endflow,73).
doAt(a15,75).
doAt(a12,76).
doAt(a11,77).
doAt(a23,78).
doAt(a8,79).
doAt(a24,80).
doAt(endflow,81).
doAt(a6,83).
doAt(a1,84).
doAt(endflow,85).
leftrightnexts(16,19).
leftrightnexts(8,11).
leftrightnexts(39,42).
leftrightnexts(31,34).
leftrightnexts(60,63).
leftrightnexts(52,55).
leftrightnexts(80,83).
leftrightnexts(72,75).
leftrightnexts(48,67).
leftrightnexts(27,46).
leftrightnexts(6,23).