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(21,22).
next(19,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(24,28).
next(28,29).
next(29,30).
next(30,31).
next(31,32).
next(32,33).
next(30,34).
next(34,35).
next(35,36).
next(36,37).
next(29,38).
next(38,39).
next(39,40).
next(40,41).
next(41,42).
next(14,43).
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(52,53).
next(53,54).
next(51,55).
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(63,64).
next(64,65).
next(62,66).
next(66,67).
next(67,68).
next(68,69).
next(61,70).
next(70,71).
next(71,72).
next(72,73).
next(73,74).
doAt(startflow,7).
doAt(a6,10).
doAt(a8,12).
doAt(a2,14).
doAt(a1,16).
doAt(a10,18).
doAt(a4,19).
doAt(a13,20).
doAt(endflow,21).
doAt(a20,23).
doAt(a18,24).
doAt(a11,25).
doAt(endflow,26).
doAt(a14,28).
doAt(a12,29).
doAt(a16,30).
doAt(a24,31).
doAt(endflow,32).
doAt(a17,34).
doAt(a7,35).
doAt(endflow,36).
doAt(a15,38).
doAt(a5,39).
doAt(a3,40).
doAt(endflow,41).
doAt(a23,44).
doAt(a21,45).
doAt(a19,46).
doAt(a25,47).
doAt(a22,48).
doAt(a10,50).
doAt(a4,51).
doAt(a13,52).
doAt(endflow,53).
doAt(a20,55).
doAt(a18,56).
doAt(a11,57).
doAt(endflow,58).
doAt(a14,60).
doAt(a12,61).
doAt(a16,62).
doAt(a24,63).
doAt(endflow,64).
doAt(a17,66).
doAt(a7,67).
doAt(endflow,68).
doAt(a15,70).
doAt(a5,71).
doAt(a3,72).
doAt(endflow,73).
compAt(a6,x24,8).
compAt(a10,x4,9).
compAt(a1,x11,13).
compAt(a10,x15,43).
subsAt(a8,11).
subsAt(a1,15).
subsAt(a10,17).
subsAt(a10,49).
leftrightnexts(31,34).
leftrightnexts(30,38).
leftrightnexts(25,28).
leftrightnexts(20,23).
leftrightnexts(63,66).
leftrightnexts(62,70).
leftrightnexts(57,60).
leftrightnexts(52,55).
leftrightnexts(15,43).