for Y in C:
  pm=Y[0]+Y[1]
  px=Y[-2]+Y[-1]
  o=[k for k in range(3) if k!=i]
  for j,(jl,jr) in enumerate(I):
   for tv in range(px-jr,pm-jl+1):
    t=tv%p
    if t in Y:continue
    B=rng(Y,t,I[o[0]])
    if not B:continue
    D=rng(Y,t,I[o[1]])
    if not D:continue
    F=0
    for b0,b1 in B:
     for c0,c1 in D:
      if hit(b0,b1,c0,c1,t):F=1
    if F:
     print('FOUND',i,len(Y),j,t,Y[0],Y[-1],B,D,flush=True)
     raise SystemExit
print('done')