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(16,20).
next(20,21).
next(21,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(23,27).
next(27,28).
next(28,29).
next(29,30).
next(21,31).
next(31,32).
next(32,33).
next(33,34).
next(34,35).
next(32,36).
next(36,37).
next(37,38).
next(38,39).
next(15,40).
next(40,41).
next(11,42).
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(51,52).
next(49,53).
next(53,54).
next(54,55).
next(55,56).
next(56,57).
next(57,58).
next(58,59).
next(56,60).
next(60,61).
next(61,62).
next(62,63).
next(54,64).
next(64,65).
next(65,66).
next(66,67).
next(67,68).
next(65,69).
next(69,70).
next(70,71).
next(71,72).
next(48,73).
next(73,74).
doAt(startflow,3).
doAt(a12,6).
doAt(a1,7).
doAt(a17,8).
doAt(a6,9).
doAt(a21,10).
doAt(a5,11).
doAt(a20,12).
doAt(a11,13).
doAt(a22,14).
doAt(a14,15).
doAt(a7,16).
doAt(a2,17).
doAt(endflow,18).
doAt(a16,20).
doAt(a18,21).
doAt(a19,22).
doAt(a4,23).
doAt(a8,24).
doAt(endflow,25).
doAt(a9,27).
doAt(a10,28).
doAt(endflow,29).
doAt(a3,31).
doAt(a4,32).
doAt(a8,33).
doAt(endflow,34).
doAt(a9,36).
doAt(a10,37).
doAt(endflow,38).
doAt(endflow,40).
doAt(a23,42).
doAt(a24,43).
doAt(a13,44).
doAt(a15,45).
doAt(a11,46).
doAt(a22,47).
doAt(a14,48).
doAt(a7,49).
doAt(a2,50).
doAt(endflow,51).
doAt(a16,53).
doAt(a18,54).
doAt(a19,55).
doAt(a4,56).
doAt(a8,57).
doAt(endflow,58).
doAt(a9,60).
doAt(a10,61).
doAt(endflow,62).
doAt(a3,64).
doAt(a4,65).
doAt(a8,66).
doAt(endflow,67).
doAt(a9,69).
doAt(a10,70).
doAt(endflow,71).
doAt(endflow,73).
compAt(a12,x4,4).
subsAt(a12,5).
leftrightnexts(24,27).
leftrightnexts(33,36).
leftrightnexts(22,31).
leftrightnexts(17,20).
leftrightnexts(16,40).
leftrightnexts(57,60).
leftrightnexts(66,69).
leftrightnexts(55,64).
leftrightnexts(50,53).
leftrightnexts(49,73).
leftrightnexts(12,42).