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(21,25).
next(25,26).
next(26,27).
next(20,28).
next(28,29).
next(29,30).
next(30,31).
next(11,32).
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(40,41).
next(38,42).
next(42,43).
next(43,44).
next(44,45).
next(45,46).
next(43,47).
next(47,48).
next(48,49).
next(42,50).
next(50,51).
next(51,52).
next(52,53).
next(10,54).
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(60,64).
next(64,65).
next(65,66).
next(66,67).
next(67,68).
next(65,69).
next(69,70).
next(70,71).
next(64,72).
next(72,73).
next(73,74).
next(74,75).
doAt(startflow,4).
doAt(a6,6).
doAt(a2,7).
doAt(a10,8).
doAt(a4,9).
doAt(a25,10).
doAt(a22,11).
doAt(a20,12).
doAt(a8,13).
doAt(a14,14).
doAt(a5,15).
doAt(a12,16).
doAt(a16,17).
doAt(endflow,18).
doAt(a9,20).
doAt(a24,21).
doAt(a19,22).
doAt(endflow,23).
doAt(a17,25).
doAt(endflow,26).
doAt(a23,28).
doAt(a15,29).
doAt(endflow,30).
doAt(a1,32).
doAt(a11,33).
doAt(a13,34).
doAt(a8,35).
doAt(a14,36).
doAt(a5,37).
doAt(a12,38).
doAt(a16,39).
doAt(endflow,40).
doAt(a9,42).
doAt(a24,43).
doAt(a19,44).
doAt(endflow,45).
doAt(a17,47).
doAt(endflow,48).
doAt(a23,50).
doAt(a15,51).
doAt(endflow,52).
doAt(a18,54).
doAt(a21,55).
doAt(a7,56).
doAt(a8,57).
doAt(a14,58).
doAt(a5,59).
doAt(a12,60).
doAt(a16,61).
doAt(endflow,62).
doAt(a9,64).
doAt(a24,65).
doAt(a19,66).
doAt(endflow,67).
doAt(a17,69).
doAt(endflow,70).
doAt(a23,72).
doAt(a15,73).
doAt(endflow,74).
compAt(a6,x19,5).
leftrightnexts(22,25).
leftrightnexts(21,28).
leftrightnexts(17,20).
leftrightnexts(44,47).
leftrightnexts(43,50).
leftrightnexts(39,42).
leftrightnexts(12,32).
leftrightnexts(66,69).
leftrightnexts(65,72).
leftrightnexts(61,64).
leftrightnexts(11,54).