an householder which , 40_MAT_13_52 , an householder which , 40_MAT_20_01 ,
 is an householder , 40_MAT_13_52 , is an householder , 40_MAT_20_01 ,
 is an householder which , 40_MAT_13_52 , is an householder which , 40_MAT_20_01 ,
 that is an householder , 40_MAT_13_52 , that is an householder , 40_MAT_20_01 ,