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(9,14).
next(14,15).
next(15,16).
next(16,17).
next(17,18).
next(18,19).
next(19,20).
next(16,21).
next(21,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(24,29).
next(29,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(30,35).
next(35,36).
next(36,37).
next(37,38).
next(38,39).
next(29,40).
next(40,41).
next(41,42).
next(42,43).
next(43,44).
next(44,45).
next(45,46).
next(46,47).
next(47,48).
doAt(startflow,5).
doAt(a25,8).
doAt(a24,9).
doAt(a21,10).
doAt(a17,11).
doAt(endflow,12).
doAt(a22,14).
doAt(a16,15).
doAt(a13,16).
doAt(a12,17).
doAt(a17,18).
doAt(endflow,19).
doAt(a19,21).
doAt(a11,22).
doAt(a23,23).
doAt(a15,24).
doAt(a3,25).
doAt(a17,26).
doAt(endflow,27).
doAt(a5,29).
doAt(a10,30).
doAt(a14,31).
doAt(a17,32).
doAt(endflow,33).
doAt(a18,35).
doAt(a2,36).
doAt(a17,37).
doAt(endflow,38).
doAt(a7,40).
doAt(a1,41).
doAt(a9,42).
doAt(a6,43).
doAt(a4,44).
doAt(a8,45).
doAt(a17,46).
doAt(endflow,47).
compAt(a25,x23,6).
subsAt(a25,7).
leftrightnexts(31,35).
leftrightnexts(30,40).
leftrightnexts(25,29).
leftrightnexts(17,21).
leftrightnexts(10,14).