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(12,17).
next(17,18).
next(18,19).
next(19,20).
next(20,21).
next(21,22).
next(22,23).
next(23,24).
next(19,25).
next(25,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(30,31).
next(27,32).
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(42,46).
next(46,47).
next(47,48).
next(38,49).
next(49,50).
next(50,51).
next(51,52).
next(52,53).
next(53,54).
next(54,55).
next(52,56).
next(56,57).
next(57,58).
doAt(startflow,6).
doAt(a20,9).
doAt(a1,11).
doAt(a21,12).
doAt(a14,14).
doAt(endflow,15).
doAt(a7,17).
doAt(a11,18).
doAt(a6,19).
doAt(a2,21).
doAt(endflow,23).
doAt(a9,26).
doAt(a16,27).
doAt(a19,28).
doAt(endflow,30).
doAt(a8,33).
doAt(a18,34).
doAt(a5,35).
doAt(a4,36).
doAt(a12,37).
doAt(a22,38).
doAt(a10,39).
doAt(a24,40).
doAt(a25,41).
doAt(a17,42).
doAt(a15,43).
doAt(endflow,44).
doAt(a13,46).
doAt(endflow,47).
doAt(a3,49).
doAt(a24,50).
doAt(a25,51).
doAt(a17,52).
doAt(a15,53).
doAt(endflow,54).
doAt(a13,56).
doAt(endflow,57).
compAt(a14,x21,8).
compAt(a14,x4,13).
compAt(a14,x10,20).
compAt(a14,x4,22).
compAt(a14,x4,25).
compAt(a14,x10,29).
compAt(a14,x10,32).
subsAt(a20,7).
subsAt(a1,10).
leftrightnexts(43,46).
leftrightnexts(53,56).
leftrightnexts(39,49).
leftrightnexts(28,32).
leftrightnexts(20,25).
leftrightnexts(13,17).