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(21,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(23,27).
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(22,36).
next(36,37).
next(37,38).
next(38,39).
next(39,40).
next(40,41).
next(41,42).
next(42,43).
next(40,44).
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).
doAt(startflow,9).
doAt(a17,13).
doAt(a21,14).
doAt(a13,17).
doAt(a19,18).
doAt(a3,20).
doAt(a2,21).
doAt(a25,22).
doAt(a4,23).
doAt(a23,24).
doAt(endflow,25).
doAt(a1,27).
doAt(a6,28).
doAt(a22,29).
doAt(a14,30).
doAt(a15,31).
doAt(a29,32).
doAt(a11,33).
doAt(endflow,34).
doAt(a5,36).
doAt(a26,37).
doAt(a16,38).
doAt(a24,39).
doAt(a12,40).
doAt(a27,41).
doAt(endflow,42).
doAt(a8,44).
doAt(a30,45).
doAt(a10,46).
doAt(a7,47).
doAt(endflow,48).
doAt(a18,50).
doAt(a9,51).
doAt(a28,52).
doAt(endflow,53).
compAt(a19,x13,10).
compAt(a13,x13,11).
compAt(a21,x13,12).
compAt(a3,x32,15).
compAt(a2,x5,16).
compAt(a3,x19,19).
leftrightnexts(24,27).
leftrightnexts(47,50).
leftrightnexts(41,44).
leftrightnexts(23,36).