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(22,23).
next(20,24).
next(24,25).
next(25,26).
next(26,27).
next(14,28).
next(28,29).
next(29,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(34,35).
next(35,36).
next(36,37).
next(37,38).
next(38,39).
next(36,40).
next(40,41).
next(41,42).
next(42,43).
next(9,44).
next(44,45).
next(45,46).
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(54,55).
next(55,56).
next(56,57).
next(54,58).
next(58,59).
next(59,60).
next(60,61).
next(48,62).
next(62,63).
next(63,64).
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(72,73).
next(70,74).
next(74,75).
next(75,76).
next(76,77).
doAt(startflow,4).
doAt(a19,5).
doAt(a11,7).
doAt(a16,8).
doAt(a14,9).
doAt(a22,10).
doAt(a15,11).
doAt(a13,12).
doAt(a1,13).
doAt(a12,14).
doAt(a17,15).
doAt(a20,16).
doAt(a21,17).
doAt(a4,18).
doAt(a9,19).
doAt(a5,20).
doAt(a25,21).
doAt(endflow,22).
doAt(a7,24).
doAt(a10,25).
doAt(endflow,26).
doAt(a24,28).
doAt(a2,29).
doAt(a3,30).
doAt(a8,31).
doAt(a20,32).
doAt(a21,33).
doAt(a4,34).
doAt(a9,35).
doAt(a5,36).
doAt(a25,37).
doAt(endflow,38).
doAt(a7,40).
doAt(a10,41).
doAt(endflow,42).
doAt(a23,44).
doAt(a18,45).
doAt(a13,46).
doAt(a1,47).
doAt(a12,48).
doAt(a17,49).
doAt(a20,50).
doAt(a21,51).
doAt(a4,52).
doAt(a9,53).
doAt(a5,54).
doAt(a25,55).
doAt(endflow,56).
doAt(a7,58).
doAt(a10,59).
doAt(endflow,60).
doAt(a24,62).
doAt(a2,63).
doAt(a3,64).
doAt(a8,65).
doAt(a20,66).
doAt(a21,67).
doAt(a4,68).
doAt(a9,69).
doAt(a5,70).
doAt(a25,71).
doAt(endflow,72).
doAt(a7,74).
doAt(a10,75).
doAt(endflow,76).
subsAt(a11,6).
leftrightnexts(21,24).
leftrightnexts(37,40).
leftrightnexts(15,28).
leftrightnexts(55,58).
leftrightnexts(71,74).
leftrightnexts(49,62).
leftrightnexts(10,44).