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(12,16).
next(16,17).
next(17,18).
next(18,19).
next(19,20).
next(20,21).
next(16,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(11,31).
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(42,46).
next(46,47).
next(47,48).
doAt(startflow,6).
doAt(a8,8).
doAt(a20,11).
doAt(a9,12).
doAt(a16,13).
doAt(endflow,14).
doAt(a17,16).
doAt(a18,17).
doAt(endflow,20).
doAt(a12,22).
doAt(a14,23).
doAt(a13,24).
doAt(a24,25).
doAt(a15,26).
doAt(endflow,29).
doAt(a5,31).
doAt(a2,32).
doAt(a25,34).
doAt(a1,35).
doAt(a7,36).
doAt(a22,37).
doAt(a4,38).
doAt(a21,39).
doAt(a3,40).
doAt(a19,41).
doAt(a11,42).
doAt(a23,43).
doAt(endflow,44).
doAt(a6,46).
doAt(endflow,47).
compAt(a16,x7,9).
compAt(a16,x10,10).
compAt(a16,x11,18).
compAt(a16,x21,19).
compAt(a16,x11,27).
compAt(a16,x21,28).
compAt(a16,x21,33).
subsAt(a8,7).
leftrightnexts(17,22).
leftrightnexts(13,16).
leftrightnexts(43,46).
leftrightnexts(12,31).