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(11,15).
next(15,16).
next(16,17).
next(17,18).
next(18,19).
next(15,20).
next(20,21).
next(21,22).
next(22,23).
next(10,24).
next(24,25).
next(25,26).
next(26,27).
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(38,39).
next(36,40).
next(40,41).
next(41,42).
next(42,43).
next(31,44).
next(44,45).
next(45,46).
next(46,47).
next(47,48).
next(48,49).
next(49,50).
next(50,51).
next(51,52).
next(49,53).
next(53,54).
next(54,55).
next(55,56).
doAt(startflow,6).
doAt(a10,8).
doAt(a12,10).
doAt(a16,11).
doAt(a1,12).
doAt(endflow,13).
doAt(a4,15).
doAt(a21,16).
doAt(endflow,18).
doAt(a8,20).
doAt(endflow,22).
doAt(a2,24).
doAt(a18,25).
doAt(a3,27).
doAt(a7,28).
doAt(a9,29).
doAt(a23,30).
doAt(a6,31).
doAt(a24,32).
doAt(a20,33).
doAt(a15,34).
doAt(a13,35).
doAt(a11,36).
doAt(a19,37).
doAt(endflow,38).
doAt(a17,40).
doAt(a25,41).
doAt(endflow,42).
doAt(a5,44).
doAt(a14,45).
doAt(a20,46).
doAt(a15,47).
doAt(a13,48).
doAt(a11,49).
doAt(a19,50).
doAt(endflow,51).
doAt(a17,53).
doAt(a25,54).
doAt(endflow,55).
compAt(a1,x8,7).
compAt(a1,x12,9).
compAt(a1,x1,17).
compAt(a1,x1,21).
compAt(a1,x1,26).
leftrightnexts(16,20).
leftrightnexts(12,15).
leftrightnexts(37,40).
leftrightnexts(50,53).
leftrightnexts(32,44).
leftrightnexts(11,24).