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(15,20).
next(20,21).
next(21,22).
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(30,31).
next(28,32).
next(32,33).
next(33,34).
next(34,35).
next(35,36).
next(36,37).
next(37,38).
next(38,39).
next(27,40).
next(40,41).
next(41,42).
next(42,43).
next(40,44).
next(44,45).
next(45,46).
next(26,47).
next(47,48).
doAt(startflow,7).
doAt(a22,10).
doAt(a15,13).
doAt(a12,14).
doAt(a23,15).
doAt(a14,16).
doAt(a16,17).
doAt(endflow,18).
doAt(a8,20).
doAt(a4,21).
doAt(a24,23).
doAt(a9,24).
doAt(a13,25).
doAt(a19,26).
doAt(a1,27).
doAt(a25,28).
doAt(a20,29).
doAt(endflow,30).
doAt(a2,32).
doAt(a5,33).
doAt(a17,34).
doAt(a10,35).
doAt(a18,36).
doAt(a6,37).
doAt(endflow,38).
doAt(a3,40).
doAt(a11,41).
doAt(endflow,42).
doAt(a7,44).
doAt(endflow,45).
doAt(endflow,47).
compAt(a15,x16,9).
compAt(a14,x11,11).
compAt(a12,x11,12).
compAt(a14,x11,22).
subsAt(a22,8).
leftrightnexts(29,32).
leftrightnexts(41,44).
leftrightnexts(28,40).
leftrightnexts(27,47).
leftrightnexts(16,20).