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(17,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(22,27).
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(34,39).
next(39,40).
next(40,41).
next(41,42).
next(33,43).
next(43,44).
next(44,45).
next(45,46).
next(29,47).
next(47,48).
next(48,49).
next(49,50).
next(50,51).
next(51,52).
next(52,53).
next(53,54).
next(54,55).
next(51,56).
next(56,57).
next(57,58).
next(58,59).
next(50,60).
next(60,61).
next(61,62).
next(62,63).
doAt(startflow,6).
doAt(a13,7).
doAt(a19,8).
doAt(a25,11).
doAt(a21,13).
doAt(a4,14).
doAt(a10,15).
doAt(a23,16).
doAt(a3,17).
doAt(a18,18).
doAt(a16,19).
doAt(endflow,20).
doAt(a5,22).
doAt(a24,23).
doAt(a16,24).
doAt(endflow,25).
doAt(a7,27).
doAt(a15,28).
doAt(a2,29).
doAt(a17,30).
doAt(a14,31).
doAt(a11,32).
doAt(a1,33).
doAt(a8,34).
doAt(a12,35).
doAt(a16,36).
doAt(endflow,37).
doAt(a6,39).
doAt(a16,40).
doAt(endflow,41).
doAt(a9,43).
doAt(a16,44).
doAt(endflow,45).
doAt(a22,47).
doAt(a14,48).
doAt(a11,49).
doAt(a1,50).
doAt(a8,51).
doAt(a12,52).
doAt(a16,53).
doAt(endflow,54).
doAt(a6,56).
doAt(a16,57).
doAt(endflow,58).
doAt(a9,60).
doAt(a16,61).
doAt(endflow,62).
compAt(a21,x17,10).
subsAt(a25,9).
subsAt(a21,12).
leftrightnexts(35,39).
leftrightnexts(34,43).
leftrightnexts(52,56).
leftrightnexts(51,60).
leftrightnexts(30,47).
leftrightnexts(23,27).
leftrightnexts(18,22).