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(26,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(31,35).
next(35,36).
next(36,37).
next(15,38).
next(38,39).
next(39,40).
next(40,41).
next(41,42).
next(42,43).
next(43,44).
next(44,45).
next(42,46).
next(46,47).
next(47,48).
next(48,49).
next(49,50).
next(50,51).
next(51,52).
next(52,53).
next(50,54).
next(54,55).
next(55,56).
next(56,57).
next(57,58).
next(55,59).
next(59,60).
next(60,61).
next(40,62).
next(62,63).
next(63,64).
next(64,65).
next(65,66).
next(63,67).
next(67,68).
next(68,69).
next(69,70).
next(70,71).
next(71,72).
next(72,73).
next(73,74).
next(71,75).
next(75,76).
next(76,77).
next(77,78).
next(78,79).
next(76,80).
next(80,81).
next(81,82).
doAt(startflow,6).
doAt(a10,10).
doAt(a12,12).
doAt(a2,13).
doAt(a17,14).
doAt(a23,15).
doAt(a25,16).
doAt(a24,17).
doAt(a22,18).
doAt(a13,19).
doAt(endflow,20).
doAt(a4,22).
doAt(a3,23).
doAt(a8,24).
doAt(a20,25).
doAt(a15,26).
doAt(a18,27).
doAt(endflow,28).
doAt(a9,30).
doAt(a21,31).
doAt(a14,32).
doAt(endflow,33).
doAt(a5,35).
doAt(endflow,36).
doAt(a6,38).
doAt(a1,39).
doAt(a16,40).
doAt(a11,41).
doAt(a22,42).
doAt(a13,43).
doAt(endflow,44).
doAt(a4,46).
doAt(a3,47).
doAt(a8,48).
doAt(a20,49).
doAt(a15,50).
doAt(a18,51).
doAt(endflow,52).
doAt(a9,54).
doAt(a21,55).
doAt(a14,56).
doAt(endflow,57).
doAt(a5,59).
doAt(endflow,60).
doAt(a19,62).
doAt(a22,63).
doAt(a13,64).
doAt(endflow,65).
doAt(a4,67).
doAt(a3,68).
doAt(a8,69).
doAt(a20,70).
doAt(a15,71).
doAt(a18,72).
doAt(endflow,73).
doAt(a9,75).
doAt(a21,76).
doAt(a14,77).
doAt(endflow,78).
doAt(a5,80).
doAt(endflow,81).
compAt(a2,x20,8).
compAt(a17,x18,9).
compAt(a12,x23,11).
subsAt(a10,7).
leftrightnexts(32,35).
leftrightnexts(27,30).
leftrightnexts(19,22).
leftrightnexts(56,59).
leftrightnexts(51,54).
leftrightnexts(43,46).
leftrightnexts(77,80).
leftrightnexts(72,75).
leftrightnexts(64,67).
leftrightnexts(41,62).
leftrightnexts(16,38).