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(22,23).
next(23,24).
next(24,25).
next(22,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(27,31).
next(31,32).
next(32,33).
next(33,34).
next(34,35).
next(35,36).
next(36,37).
next(37,38).
next(26,39).
next(39,40).
next(17,41).
next(41,42).
next(42,43).
next(43,44).
next(44,45).
next(45,46).
next(46,47).
next(47,48).
next(48,49).
next(46,50).
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(59,60).
next(60,61).
next(61,62).
next(50,63).
next(63,64).
doAt(startflow,6).
doAt(a7,9).
doAt(a24,12).
doAt(a25,13).
doAt(a5,14).
doAt(a3,15).
doAt(a20,16).
doAt(a17,17).
doAt(a11,18).
doAt(a15,19).
doAt(a6,20).
doAt(a4,21).
doAt(a21,22).
doAt(a9,23).
doAt(endflow,24).
doAt(a12,26).
doAt(a13,27).
doAt(a18,28).
doAt(endflow,29).
doAt(a2,31).
doAt(a19,32).
doAt(a23,33).
doAt(a8,34).
doAt(a1,35).
doAt(a22,36).
doAt(endflow,37).
doAt(endflow,39).
doAt(a10,41).
doAt(a16,42).
doAt(a15,43).
doAt(a6,44).
doAt(a4,45).
doAt(a21,46).
doAt(a9,47).
doAt(endflow,48).
doAt(a12,50).
doAt(a13,51).
doAt(a18,52).
doAt(endflow,53).
doAt(a2,55).
doAt(a19,56).
doAt(a23,57).
doAt(a8,58).
doAt(a1,59).
doAt(a22,60).
doAt(endflow,61).
doAt(endflow,63).
compAt(a25,x18,8).
compAt(a5,x19,11).
subsAt(a7,7).
subsAt(a24,10).
leftrightnexts(28,31).
leftrightnexts(27,39).
leftrightnexts(23,26).
leftrightnexts(52,55).
leftrightnexts(51,63).
leftrightnexts(47,50).
leftrightnexts(18,41).