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(9,13).
next(13,14).
next(14,15).
next(15,16).
next(16,17).
next(17,18).
next(18,19).
next(19,20).
next(20,21).
next(21,22).
next(19,23).
next(23,24).
next(24,25).
next(18,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(30,31).
next(31,32).
next(6,33).
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(41,42).
next(42,43).
next(43,44).
next(44,45).
next(45,46).
next(46,47).
next(47,48).
next(45,49).
next(49,50).
next(50,51).
next(44,52).
next(52,53).
next(53,54).
next(54,55).
next(55,56).
next(56,57).
next(57,58).
next(4,59).
next(59,60).
next(60,61).
next(61,62).
next(62,63).
next(63,64).
next(64,65).
next(62,66).
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(72,76).
next(76,77).
next(77,78).
next(71,79).
next(79,80).
next(80,81).
next(81,82).
next(82,83).
next(83,84).
next(84,85).
doAt(startflow,3).
doAt(a3,4).
doAt(a1,5).
doAt(a25,6).
doAt(a18,7).
doAt(a5,8).
doAt(a21,9).
doAt(a14,10).
doAt(endflow,11).
doAt(a23,13).
doAt(a20,14).
doAt(a15,15).
doAt(a6,16).
doAt(a11,17).
doAt(a22,18).
doAt(a19,19).
doAt(a7,20).
doAt(endflow,21).
doAt(a12,23).
doAt(endflow,24).
doAt(a4,26).
doAt(a2,27).
doAt(a16,28).
doAt(a13,29).
doAt(a9,30).
doAt(endflow,31).
doAt(a10,33).
doAt(a5,34).
doAt(a21,35).
doAt(a14,36).
doAt(endflow,37).
doAt(a23,39).
doAt(a20,40).
doAt(a15,41).
doAt(a6,42).
doAt(a11,43).
doAt(a22,44).
doAt(a19,45).
doAt(a7,46).
doAt(endflow,47).
doAt(a12,49).
doAt(endflow,50).
doAt(a4,52).
doAt(a2,53).
doAt(a16,54).
doAt(a13,55).
doAt(a9,56).
doAt(endflow,57).
doAt(a8,59).
doAt(a24,60).
doAt(a5,61).
doAt(a21,62).
doAt(a14,63).
doAt(endflow,64).
doAt(a23,66).
doAt(a20,67).
doAt(a15,68).
doAt(a6,69).
doAt(a11,70).
doAt(a22,71).
doAt(a19,72).
doAt(a7,73).
doAt(endflow,74).
doAt(a12,76).
doAt(endflow,77).
doAt(a4,79).
doAt(a2,80).
doAt(a16,81).
doAt(a13,82).
doAt(a9,83).
doAt(endflow,84).
leftrightnexts(20,23).
leftrightnexts(19,26).
leftrightnexts(10,13).
leftrightnexts(46,49).
leftrightnexts(45,52).
leftrightnexts(36,39).
leftrightnexts(7,33).
leftrightnexts(73,76).
leftrightnexts(72,79).
leftrightnexts(63,66).
leftrightnexts(5,59).