Sysode linear 2order 2eq

Here, it is causing the problem. The func contains list ```[y(t), x(t)]``` so when I declare ```x``` as ```func[0].func``` then ```x``` stores ```y``` so this cause problem in initializing of ```r['a1']``` which should be ```fc[0,x(t),1]``` but due to above exchanges it is storing ```fc[0,y(t),1]```. Thus value of ```r['a1']``` becomes 0 instead of 1.