int trityp(unsigned short i,unsigned short j, unsigned short k)
{
  unsigned int trityp ;
  if ( (i == 0) || (j == 0) || (k == 0))
      trityp = 4 ;
  else
    {
  trityp = 0 ;
  if ( i == j)
      trityp = trityp + 1 ;
  if ( i == k) 
      trityp = trityp + 2 ;
  if ( j == k )
      trityp = trityp + 3 ;
  if (trityp == 0)
    {
      if ( (i+j <= k) || (j+k <= i) || (i+k <= j))
          trityp = 4 ;
      else
          trityp = 1 ;
    }
  else
    {
  if (trityp > 3)
      trityp = 3 ;
  else
    if ( (trityp == 1) && (i+j > k) )
        trityp = 2 ;
    else
      if ( (trityp == 2) && (i+k > j) )
        trityp = 2 ;
      else
        if ( (trityp == 3) && (j+k > i))
          trityp  = 2 ;
        else
          trityp = 4 ;
    }
    }
  return(trityp);
}