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(15,19).
next(19,20).
next(20,21).
next(21,22).
next(22,23).
next(23,24).
next(24,25).
next(14,26).
next(26,27).
next(27,28).
next(12,29).
next(29,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(34,35).
next(35,36).
next(33,37).
next(37,38).
next(38,39).
next(39,40).
next(40,41).
next(41,42).
next(42,43).
next(32,44).
next(44,45).
next(45,46).
next(30,47).
next(47,48).
next(48,49).
next(49,50).
next(50,51).
next(51,52).
next(52,53).
next(50,54).
next(54,55).
next(55,56).
next(56,57).
next(57,58).
next(58,59).
next(59,60).
next(49,61).
next(61,62).
next(62,63).
next(11,64).
next(64,65).
next(65,66).
next(66,67).
next(67,68).
next(68,69).
next(69,70).
next(70,71).
next(71,72).
next(69,73).
next(73,74).
next(74,75).
next(75,76).
next(76,77).
next(77,78).
next(78,79).
next(68,80).
next(80,81).
next(81,82).
doAt(startflow,6).
doAt(a6,8).
doAt(a7,9).
doAt(a18,10).
doAt(a8,11).
doAt(a11,12).
doAt(a23,13).
doAt(a9,14).
doAt(a3,15).
doAt(a24,16).
doAt(endflow,17).
doAt(a12,19).
doAt(a25,20).
doAt(a19,21).
doAt(a15,22).
doAt(a13,23).
doAt(endflow,24).
doAt(a21,26).
doAt(endflow,27).
doAt(a1,29).
doAt(a4,30).
doAt(a2,31).
doAt(a9,32).
doAt(a3,33).
doAt(a24,34).
doAt(endflow,35).
doAt(a12,37).
doAt(a25,38).
doAt(a19,39).
doAt(a15,40).
doAt(a13,41).
doAt(endflow,42).
doAt(a21,44).
doAt(endflow,45).
doAt(a20,47).
doAt(a14,48).
doAt(a9,49).
doAt(a3,50).
doAt(a24,51).
doAt(endflow,52).
doAt(a12,54).
doAt(a25,55).
doAt(a19,56).
doAt(a15,57).
doAt(a13,58).
doAt(endflow,59).
doAt(a21,61).
doAt(endflow,62).
doAt(a10,64).
doAt(a5,65).
doAt(a16,66).
doAt(a22,67).
doAt(a9,68).
doAt(a3,69).
doAt(a24,70).
doAt(endflow,71).
doAt(a12,73).
doAt(a25,74).
doAt(a19,75).
doAt(a15,76).
doAt(a13,77).
doAt(endflow,78).
doAt(a21,80).
doAt(endflow,81).
subsAt(a6,7).
leftrightnexts(16,19).
leftrightnexts(15,26).
leftrightnexts(34,37).
leftrightnexts(33,44).
leftrightnexts(51,54).
leftrightnexts(50,61).
leftrightnexts(31,47).
leftrightnexts(13,29).
leftrightnexts(70,73).
leftrightnexts(69,80).
leftrightnexts(12,64).