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(17,30).
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(39,40).
next(40,41).
next(41,42).
next(39,43).
next(43,44).
next(44,45).
doAt(startflow,8).
doAt(a5,11).
doAt(a14,13).
doAt(a1,17).
doAt(a13,19).
doAt(a12,20).
doAt(a3,21).
doAt(a8,22).
doAt(a10,23).
doAt(a11,24).
doAt(endflow,25).
doAt(a9,27).
doAt(endflow,28).
doAt(a2,32).
doAt(a7,33).
doAt(a4,34).
doAt(a6,35).
doAt(a12,36).
doAt(a3,37).
doAt(a8,38).
doAt(a10,39).
doAt(a11,40).
doAt(endflow,41).
doAt(a9,43).
doAt(endflow,44).
compAt(a12,x3,9).
compAt(a5,x3,10).
compAt(a12,x5,12).
compAt(a12,x1,14).
compAt(a13,x1,15).
compAt(a12,x6,16).
compAt(a12,x3,18).
compAt(a3,x2,30).
compAt(a13,x2,31).
leftrightnexts(24,27).
leftrightnexts(40,43).
leftrightnexts(18,30).