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(20,24).
next(24,25).
next(25,26).
next(6,27).
next(27,28).
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(40,41).
next(41,42).
next(42,43).
next(40,44).
next(44,45).
next(45,46).
next(46,47).
next(44,48).
next(48,49).
next(49,50).
next(31,51).
next(51,52).
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(60,64).
next(64,65).
next(65,66).
next(66,67).
next(64,68).
next(68,69).
next(69,70).
doAt(startflow,3).
doAt(a13,5).
doAt(a25,6).
doAt(a23,7).
doAt(a4,8).
doAt(a20,9).
doAt(a24,10).
doAt(a1,11).
doAt(a22,12).
doAt(a8,13).
doAt(a17,14).
doAt(a12,15).
doAt(a16,16).
doAt(a5,17).
doAt(endflow,18).
doAt(a11,20).
doAt(a10,21).
doAt(endflow,22).
doAt(a15,24).
doAt(endflow,25).
doAt(a9,27).
doAt(a18,28).
doAt(a2,29).
doAt(a7,30).
doAt(a14,31).
doAt(a3,32).
doAt(a20,33).
doAt(a24,34).
doAt(a1,35).
doAt(a22,36).
doAt(a8,37).
doAt(a17,38).
doAt(a12,39).
doAt(a16,40).
doAt(a5,41).
doAt(endflow,42).
doAt(a11,44).
doAt(a10,45).
doAt(endflow,46).
doAt(a15,48).
doAt(endflow,49).
doAt(a19,51).
doAt(a6,52).
doAt(a20,53).
doAt(a24,54).
doAt(a1,55).
doAt(a22,56).
doAt(a8,57).
doAt(a17,58).
doAt(a12,59).
doAt(a16,60).
doAt(a5,61).
doAt(endflow,62).
doAt(a11,64).
doAt(a10,65).
doAt(endflow,66).
doAt(a15,68).
doAt(endflow,69).
compAt(a13,x15,4).
leftrightnexts(21,24).
leftrightnexts(17,20).
leftrightnexts(45,48).
leftrightnexts(41,44).
leftrightnexts(65,68).
leftrightnexts(61,64).
leftrightnexts(32,51).
leftrightnexts(7,27).