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(4,16).
next(16,17).
next(17,18).
next(18,19).
next(19,20).
next(20,21).
next(21,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(17,28).
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(39,40).
next(30,41).
next(41,42).
next(42,43).
next(43,44).
next(44,45).
next(45,46).
next(46,47).
next(47,48).
next(48,49).
next(49,50).
next(50,51).
next(28,52).
next(52,53).
next(53,54).
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(62,63).
next(63,64).
next(64,65).
next(65,66).
next(66,67).
next(57,68).
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(77,78).
doAt(startflow,3).
doAt(a19,4).
doAt(a7,5).
doAt(a4,6).
doAt(a12,7).
doAt(a14,8).
doAt(a16,9).
doAt(a22,10).
doAt(a21,11).
doAt(a2,12).
doAt(a11,13).
doAt(endflow,14).
doAt(a6,16).
doAt(a10,17).
doAt(a15,18).
doAt(a12,19).
doAt(a14,20).
doAt(a16,21).
doAt(a22,22).
doAt(a21,23).
doAt(a2,24).
doAt(a11,25).
doAt(endflow,26).
doAt(a24,28).
doAt(a25,29).
doAt(a1,30).
doAt(a13,31).
doAt(a12,32).
doAt(a14,33).
doAt(a16,34).
doAt(a22,35).
doAt(a21,36).
doAt(a2,37).
doAt(a11,38).
doAt(endflow,39).
doAt(a3,41).
doAt(a5,42).
doAt(a12,43).
doAt(a14,44).
doAt(a16,45).
doAt(a22,46).
doAt(a21,47).
doAt(a2,48).
doAt(a11,49).
doAt(endflow,50).
doAt(a18,52).
doAt(a23,53).
doAt(a20,54).
doAt(a9,55).
doAt(a8,56).
doAt(a1,57).
doAt(a13,58).
doAt(a12,59).
doAt(a14,60).
doAt(a16,61).
doAt(a22,62).
doAt(a21,63).
doAt(a2,64).
doAt(a11,65).
doAt(endflow,66).
doAt(a3,68).
doAt(a5,69).
doAt(a12,70).
doAt(a14,71).
doAt(a16,72).
doAt(a22,73).
doAt(a21,74).
doAt(a2,75).
doAt(a11,76).
doAt(endflow,77).
leftrightnexts(31,41).
leftrightnexts(58,68).
leftrightnexts(29,52).
leftrightnexts(18,28).
leftrightnexts(5,16).