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(14,18).
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(27,28).
next(13,29).
next(29,30).
next(7,31).
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(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(45,61).
next(61,62).
doAt(startflow,6).
doAt(a16,7).
doAt(a1,8).
doAt(a5,9).
doAt(a20,11).
doAt(a15,12).
doAt(a17,13).
doAt(a6,14).
doAt(a21,15).
doAt(endflow,16).
doAt(a7,18).
doAt(a11,19).
doAt(a2,20).
doAt(endflow,21).
doAt(a10,23).
doAt(a4,24).
doAt(a14,25).
doAt(a18,26).
doAt(endflow,27).
doAt(endflow,29).
doAt(a3,31).
doAt(a12,32).
doAt(a13,33).
doAt(a9,34).
doAt(a22,36).
doAt(a25,37).
doAt(a24,38).
doAt(a8,39).
doAt(a19,40).
doAt(a5,41).
doAt(a20,43).
doAt(a15,44).
doAt(a17,45).
doAt(a6,46).
doAt(a21,47).
doAt(endflow,48).
doAt(a7,50).
doAt(a11,51).
doAt(a2,52).
doAt(endflow,53).
doAt(a10,55).
doAt(a4,56).
doAt(a14,57).
doAt(a18,58).
doAt(endflow,59).
doAt(endflow,61).
compAt(a5,x12,35).
subsAt(a20,10).
subsAt(a20,42).
leftrightnexts(20,23).
leftrightnexts(15,18).
leftrightnexts(14,29).
leftrightnexts(52,55).
leftrightnexts(47,50).
leftrightnexts(46,61).
leftrightnexts(8,31).