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(18,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(28,29).
next(16,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(34,35).
next(31,36).
next(36,37).
next(37,38).
next(38,39).
next(39,40).
next(40,41).
next(41,42).
next(42,43).
next(15,44).
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(49,53).
next(53,54).
next(54,55).
next(55,56).
next(56,57).
next(57,58).
next(58,59).
next(59,60).
next(44,61).
next(61,62).
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(68,72).
next(72,73).
next(73,74).
next(74,75).
next(75,76).
next(76,77).
next(77,78).
next(78,79).
doAt(startflow,8).
doAt(a22,9).
doAt(a23,11).
doAt(a4,14).
doAt(a19,15).
doAt(a24,16).
doAt(a21,17).
doAt(a8,18).
doAt(a16,19).
doAt(endflow,20).
doAt(a7,22).
doAt(a25,23).
doAt(a18,24).
doAt(a9,25).
doAt(a2,26).
doAt(a13,27).
doAt(endflow,28).
doAt(a5,30).
doAt(a8,31).
doAt(a16,32).
doAt(endflow,34).
doAt(a7,36).
doAt(a25,37).
doAt(a18,38).
doAt(a9,39).
doAt(a2,40).
doAt(a13,41).
doAt(endflow,42).
doAt(a6,44).
doAt(a14,45).
doAt(a15,46).
doAt(a20,47).
doAt(a3,48).
doAt(a8,49).
doAt(a16,50).
doAt(endflow,51).
doAt(a7,53).
doAt(a25,54).
doAt(a18,55).
doAt(a9,56).
doAt(a2,57).
doAt(a13,58).
doAt(endflow,59).
doAt(a1,61).
doAt(a17,62).
doAt(a11,63).
doAt(a12,64).
doAt(a15,65).
doAt(a20,66).
doAt(a3,67).
doAt(a8,68).
doAt(a16,69).
doAt(endflow,70).
doAt(a7,72).
doAt(a25,73).
doAt(a18,74).
doAt(a9,75).
doAt(a2,76).
doAt(a13,77).
doAt(endflow,78).
compAt(a4,x16,13).
compAt(a21,x15,33).
subsAt(a23,10).
subsAt(a4,12).
leftrightnexts(19,22).
leftrightnexts(32,36).
leftrightnexts(17,30).
leftrightnexts(50,53).
leftrightnexts(69,72).
leftrightnexts(45,61).
leftrightnexts(16,44).