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(19,20).
next(20,21).
next(21,22).
next(19,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(27,31).
next(31,32).
next(32,33).
next(33,34).
next(31,35).
next(35,36).
next(36,37).
next(16,38).
next(38,39).
next(39,40).
next(40,41).
next(41,42).
next(42,43).
next(40,44).
next(44,45).
next(45,46).
next(46,47).
next(47,48).
next(48,49).
next(49,50).
next(50,51).
next(48,52).
next(52,53).
next(53,54).
next(54,55).
next(52,56).
next(56,57).
next(57,58).
next(15,59).
next(59,60).
next(60,61).
next(61,62).
next(62,63).
next(63,64).
next(64,65).
next(65,66).
next(66,67).
next(64,68).
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(78,79).
next(76,80).
next(80,81).
next(81,82).
doAt(startflow,8).
doAt(a8,9).
doAt(a15,11).
doAt(a21,13).
doAt(a1,14).
doAt(a12,15).
doAt(a16,16).
doAt(a13,17).
doAt(a11,18).
doAt(a19,19).
doAt(a17,20).
doAt(endflow,21).
doAt(a14,23).
doAt(a22,24).
doAt(a9,25).
doAt(a5,26).
doAt(a20,27).
doAt(a24,28).
doAt(endflow,29).
doAt(a6,31).
doAt(a10,32).
doAt(endflow,33).
doAt(a4,35).
doAt(endflow,36).
doAt(a2,38).
doAt(a11,39).
doAt(a19,40).
doAt(a17,41).
doAt(endflow,42).
doAt(a14,44).
doAt(a22,45).
doAt(a9,46).
doAt(a5,47).
doAt(a20,48).
doAt(a24,49).
doAt(endflow,50).
doAt(a6,52).
doAt(a10,53).
doAt(endflow,54).
doAt(a4,56).
doAt(endflow,57).
doAt(a18,59).
doAt(a7,60).
doAt(a23,61).
doAt(a25,62).
doAt(a11,63).
doAt(a19,64).
doAt(a17,65).
doAt(endflow,66).
doAt(a14,68).
doAt(a22,69).
doAt(a9,70).
doAt(a5,71).
doAt(a20,72).
doAt(a24,73).
doAt(endflow,74).
doAt(a6,76).
doAt(a10,77).
doAt(endflow,78).
doAt(a4,80).
doAt(endflow,81).
subsAt(a15,10).
subsAt(a21,12).
leftrightnexts(32,35).
leftrightnexts(28,31).
leftrightnexts(20,23).
leftrightnexts(53,56).
leftrightnexts(49,52).
leftrightnexts(41,44).
leftrightnexts(17,38).
leftrightnexts(77,80).
leftrightnexts(73,76).
leftrightnexts(65,68).
leftrightnexts(16,59).