function answer=rklesseq2(m,M)

  % This program tells whether interval matrix  px3 [m,M] with nonnegative first column
  % contains a matrix  A such that  A^w linear combination of A^v A^1 with v w = 2 3 or 3 2
  % that is whether mrk(m,M) <=2  
  % answer=1 corresponds positive answer
  % answer=0  negative answer

  answer=0;
  
  a=sist(m(:,1),m(:,2),M(:,3),M(:,1),M(:,2),m(:,3));

  b=sist(m(:,1),-M(:,2),M(:,3),M(:,1),-m(:,2),m(:,3));

  c=sist(-M(:,1),m(:,2),M(:,3),-m(:,1),M(:,2),m(:,3));

d=sist(-M(:,1),-M(:,2),M(:,3),-m(:,1),-m(:,2),m(:,3));


  
  if a+b+c+d>=1
    answer=1;
  return
    else
      a1=sist(m(:,1),m(:,3),M(:,2),M(:,1),M(:,3),m(:,2));	
b1=sist(m(:,1),-M(:,3),M(:,2),M(:,1),-m(:,3),m(:,2));
c1=sist(-M(:,1),m(:,3),M(:,2),-m(:,1),M(:,3),m(:,2));
d1=sist(-M(:,1),-M(:,3),M(:,2),-m(:,1),-m(:,3),m(:,2));
if a1+b1+c1+d1>=1
  answer=1;
end
  end