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(6,12).
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(18,24).
next(24,25).
next(25,26).
next(26,27).
next(17,28).
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(30,39).
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(41,49).
next(49,50).
next(50,51).
next(51,52).
next(52,53).
next(53,54).
next(54,55).
next(55,56).
next(56,57).
doAt(startflow,5).
doAt(a19,6).
doAt(a16,8).
doAt(a3,9).
doAt(endflow,10).
doAt(a5,13).
doAt(a11,15).
doAt(a1,16).
doAt(a18,17).
doAt(a21,18).
doAt(a8,19).
doAt(endflow,22).
doAt(a15,24).
doAt(endflow,26).
doAt(a22,28).
doAt(a25,29).
doAt(a24,30).
doAt(a12,31).
doAt(a2,32).
doAt(a4,33).
doAt(a7,34).
doAt(endflow,37).
doAt(a23,39).
doAt(a6,41).
doAt(a17,42).
doAt(a2,43).
doAt(a4,44).
doAt(a7,45).
doAt(endflow,47).
doAt(a13,49).
doAt(a10,50).
doAt(a14,51).
doAt(a9,52).
doAt(a2,53).
doAt(a4,54).
doAt(a7,55).
doAt(endflow,56).
compAt(a3,x9,12).
compAt(a3,x6,14).
compAt(a16,x2,20).
compAt(a3,x25,21).
compAt(a16,x2,25).
compAt(a16,x2,35).
compAt(a3,x25,36).
compAt(a3,x25,40).
compAt(a16,x2,46).
subsAt(a16,7).
leftrightnexts(19,24).
leftrightnexts(42,49).
leftrightnexts(31,39).
leftrightnexts(18,28).
leftrightnexts(7,12).