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(12,17).
next(17,18).
next(18,19).
next(19,20).
next(20,21).
next(8,22).
next(22,23).
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(27,32).
next(32,33).
next(33,34).
next(34,35).
next(35,36).
next(23,37).
next(37,38).
next(38,39).
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(44,49).
next(49,50).
next(50,51).
next(51,52).
next(52,53).
next(40,54).
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(58,63).
next(63,64).
next(64,65).
next(65,66).
next(66,67).
next(54,68).
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(73,78).
next(78,79).
next(79,80).
next(80,81).
next(81,82).
doAt(startflow,4).
doAt(a7,6).
doAt(a10,7).
doAt(a11,8).
doAt(a1,9).
doAt(a16,10).
doAt(a21,11).
doAt(a13,12).
doAt(a18,13).
doAt(a19,14).
doAt(endflow,15).
doAt(a8,17).
doAt(a22,18).
doAt(a19,19).
doAt(endflow,20).
doAt(a6,22).
doAt(a4,23).
doAt(a24,24).
doAt(a16,25).
doAt(a21,26).
doAt(a13,27).
doAt(a18,28).
doAt(a19,29).
doAt(endflow,30).
doAt(a8,32).
doAt(a22,33).
doAt(a19,34).
doAt(endflow,35).
doAt(a14,37).
doAt(a20,38).
doAt(a15,39).
doAt(a12,40).
doAt(a9,41).
doAt(a16,42).
doAt(a21,43).
doAt(a13,44).
doAt(a18,45).
doAt(a19,46).
doAt(endflow,47).
doAt(a8,49).
doAt(a22,50).
doAt(a19,51).
doAt(endflow,52).
doAt(a3,54).
doAt(a25,55).
doAt(a16,56).
doAt(a21,57).
doAt(a13,58).
doAt(a18,59).
doAt(a19,60).
doAt(endflow,61).
doAt(a8,63).
doAt(a22,64).
doAt(a19,65).
doAt(endflow,66).
doAt(a2,68).
doAt(a17,69).
doAt(a23,70).
doAt(a16,71).
doAt(a21,72).
doAt(a13,73).
doAt(a18,74).
doAt(a19,75).
doAt(endflow,76).
doAt(a8,78).
doAt(a22,79).
doAt(a19,80).
doAt(endflow,81).
subsAt(a7,5).
leftrightnexts(13,17).
leftrightnexts(28,32).
leftrightnexts(45,49).
leftrightnexts(59,63).
leftrightnexts(74,78).
leftrightnexts(55,68).
leftrightnexts(41,54).
leftrightnexts(24,37).
leftrightnexts(9,22).